An anti-adhesive film for pre-laid waterproof coiled material, its preparation method and application

Abstract

The present invention discloses an anti-adhesive film for pre-laid waterproof coiled materials, its preparation method and application. The anti-adhesive film for pre-laid waterproof coiled materials is prepared from an aqueous coating and a reinforcing material. The reinforcing material is a continuous porous material, with a grammage of 12-80 g / m<supgt;2< / supgt;, a thickness of 0.05-0.7 mm, and a mesh pore diameter of 0.01-5 mm. The anti-adhesive film for pre-laid waterproof coiled materials prepared by the present invention has a rough surface. As an anti-adhesive and weather-resistant isolation material for pre-laid coiled materials, it does not require a removable release film, can be bonded to the post-cast concrete, and facilitates the watertight sealing at the lap joint of the coiled materials; moreover, the present invention can be prefabricated and then wound for storage, endowing the pre-laid coiled materials with efficient, clean and convenient production.

Description

Technical Field

[0001] The invention belongs to the technical field of pre-laid self-adhesive waterproof coiled materials, and particularly relates to an anti-adhesive film for pre-laid waterproof coiled materials, a preparation method thereof and an application thereof. Background Technique

[0002] Pre-laid self-adhesive waterproof coiled materials can achieve full adhesion with the structure and are widely used in underground engineering, open-cut tunnel engineering, mined tunnel engineering, underground pipe gallery waterproofing engineering, etc. due to their excellent anti-water-channeling performance. Pre-laid self-adhesive waterproof coiled materials mainly include polymer pre-laid self-adhesive waterproof coiled materials and asphalt-based pre-laid self-adhesive waterproof coiled materials. Among them, the polymer pre-laid self-adhesive waterproof coiled materials are composed of a polymer sheet, a self-adhesive layer, and an anti-adhesive and weather-resistant layer; the asphalt-based pre-laid self-adhesive waterproof coiled materials are composed of a PE film, a base fabric, a modified asphalt coating, and an anti-adhesive and weather-resistant layer. The anti-adhesive and weather-resistant layer is a very important structural layer of the pre-laid waterproof coiled material, and it needs to have the characteristics of pollution resistance, aging resistance, sun protection, pedestrian access, and anti-adhesion (preventing the adhesive layer from bonding with the main material).

[0003] Generally, inorganic particles are covered or a coating is pre-sprayed and then an isolation film is coated as the anti-adhesive and weather-resistant material for pre-laid waterproof coiled materials.

[0004] Among them, inorganic particles for pre-laid coiled materials mostly use cement sand, quartz sand, mullite sand, sintered sand, painted pottery sand, etc. Since the combination of inorganic particles and the adhesive layer is weak, phenomena such as sand falling and particle sinking are likely to occur during construction and application, and the inorganic particles cannot completely cover the adhesive layer, resulting in the direct exposure of the adhesive layer to the air, making it vulnerable to oxidation or corrosion by oxygen in the air or oxidation or corrosion substances in water bodies and damage by ultraviolet rays in sunlight. As a result, the performance of the adhesive layer drops sharply over time. During the construction of some underground engineering and open-cut tunnel engineering, after laying the pre-laid self-adhesive coiled material, steel bars need to be tied before pouring concrete. During this period, the pre-laid waterproof coiled material needs to be exposed to the sun for sometimes up to 2 months. After long-term outdoor exposure, the adhesive layer of the particle-surface pre-laid coiled material is very likely to age, thus affecting the pre-laid self-adhesive effect. At the same time, the self-weight of the inorganic particle-surface coiled material is also relatively large, making transportation and construction difficult; the dust is relatively large during the sand spreading process of cement sand, quartz sand, etc., and the production and manufacturing environment is harsh.

[0005] For the pre-laid coiled material with a coating pre-sprayed and then an isolation film coated, the coating to be pre-sprayed needs to be dried at high temperature online, resulting in slow production and preparation efficiency, and the production environment of the spraying workshop is not clean enough. The isolation film needs to be torn off when tying steel bars, which is time-consuming and laborious and no longer has a protective effect on the coating. In the face of harsh construction environments and weather factors, it is easy to cause the bonding performance of the adhesive layer to be greatly reduced after the coating is damaged. Moreover, waste is generated after the isolation film is torn off, which does not meet the requirements of carbon peak and carbon neutrality development.

[0006] Based on the above problems, non-inorganic particles and anti-sticking and weather-resistant materials that do not require coated separator films have been gradually explored at home and abroad.

[0007] At present, it has been reported at home and abroad that water-soluble coatings are used to replace ordinary separator materials and applied to wet-laid and pre-laid waterproof coiled materials. However, because water-soluble coating films are used, this type of product cannot come into contact with water during the production, transportation, storage, and the period of waiting for the cast-in-place concrete after construction. This restrictive factor greatly reduces the application and promotion of this product.

[0008] CN109575824A discloses a weather-resistant film for pre-laid waterproof coiled materials, its preparation method and uses. The weather-resistant film includes a separator layer, a reinforcing layer, and a weather-resistant adhesive layer laminated in sequence. The separator layer is a polyvinyl alcohol solution. The structure of this invention is complex and the production process is cumbersome. Polyvinyl alcohol has good water solubility, and the interlayer adhesion force will decrease significantly after long-term immersion in water between each layer.

[0009] CN104204378A discloses a waterproof film, a polymer pre-laid waterproof coiled material that can be directly wound up. It includes a carrier sheet (layer A), a waterproof adhesive layer (layer B), a protective coating (layer C), and a peelable material (layer D). The protective coating basically does not contain surfactants and contains acrylic or methacrylic polymers or copolymers, inorganic fillers, and white pigments. The peelable material contains amorphous nano-silica and a polymer binder. The waterproof film does not require a release liner. It can be strongly bonded to concrete, withstand pedestrian traffic, and can be immersed in water for a long time. When preparing this waterproof film, the peelable material (layer D) needs to be pre-coated on a plastic film, then the protective coating (C) is coated on the peelable material, dried and wound into a roll. Then, the roll containing layer C, layer D, and the plastic film is unrolled, layer C is pasted on layer B, the plastic film is removed from layer D, and the four-layer structure containing layer D, layer C, layer B, and layer A is wound into a roll (layer A is on the outside of the coiled material). The peelable material layer D is an aqueous mixture of silica and an adhesive. Due to the poor anti-deformation ability of the coating in this invention, the carrier sheet layer A needs to be placed on the outside of the coiled material, resulting in inconvenience during construction. When the coiled material is transported and stored violently, the coating is extremely prone to cracking due to the deformation of the coiled material. After the coating cracks, the pressure-sensitive adhesive attached to the coating is exposed and adhered to the carrier sheet, resulting in problems such as inability to unroll or difficult unrolling. Moreover, the peelable material is water-soluble and will melt when it encounters water.

[0010] As can be seen from the above, the existing anti-sticking and weather-resistant material technologies all have varying degrees of production and application problems, such as slow production efficiency, complex and cumbersome processes, a significant decrease in interlayer adhesion force after long-term immersion in water, inconvenient construction, coating cracking due to coiled material deformation during transportation and storage, and difficult peeling after encountering water. Therefore, there is an urgent need to provide a new anti-sticking and weather-resistant material technology to solve the problems existing in the above production and application. Summary of the Invention

[0011] In order to solve the above technical problems, the present invention provides an anti-sticking film for pre-laid waterproof coiled materials, a preparation method thereof, and an application thereof.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] An anti-sticking film for pre-laid waterproof coiled materials is prepared from an aqueous coating and a reinforcing material. Among them, the reinforcing material is a continuous porous material, and the grammage of the reinforcing material is 12-80 g / m 2 , the thickness is 0.05-0.7 mm, and the pore diameter of the mesh hole is 0.01-5 mm.

[0014] The reinforcing material in the present invention is a film material with a three-dimensional interpenetrating cross-linked network structure, and its pore diameter is an irregular pore diameter. The reinforcing material is prepared by a process of high-temperature melting, spinning, and high-temperature ironing of a thermoplastic resin. Among them, the thermoplastic resin is at least one of PA, EVA, TPU, PES, PP, PE, PET, PVC, PS, TPO, PC, polyphenylene ether, and polysulfone resin. Preferably, the grammage of the reinforcing material is 15-60 g / m 2 , the thickness is 0.05-0.5 mm, and the pore diameter of the mesh hole is 0.03-3 mm.

[0015] The aqueous coating in the present invention includes a polymer emulsion, a filler, and water.

[0016] In some specific embodiments, the aqueous coating, by weight, includes 10-30 parts of a polymer emulsion, 5-20 parts of a filler, and 20-35 parts of water.

[0017] In some specific embodiments, the Tg of the polymer emulsion < 0 °C. Preferably, the polymer emulsion is at least one of an acrylic emulsion, a styrene-butadiene emulsion, a VAE emulsion, and a polyurethane emulsion. Further preferably, it is an acrylic emulsion and a styrene-butadiene emulsion; more preferably, the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.3-0.6.

[0018] In some specific embodiments, the filler is organic particles and / or inorganic particles, and the mesh number is 60-120 mesh; preferably, the filler is at least one of quartz sand, calcium sand, sintered sand, mullite sand, river sand, sea sand, and polymer particles. Further preferably, the grading of the filler is 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0 - 0.2: 0.3 - 0.7: 0.3 - 0.7.

[0019] The thickness of the anti-sticking film for pre-laid waterproof coiled materials in the present invention is 0.06-1.0 mm, preferably 0.06-0.5 mm, and more preferably 0.06-0.35 mm.

[0020] In some preferred embodiments, in order to improve the interfacial bonding strength between the reinforcing material and the waterborne coating, the surface of the reinforcing material is pretreated with an interfacial bonding agent. The pretreatment in the present invention is conventional spraying, scraping, smearing or impregnation.

[0021] Preferably, the interfacial bonding agent is compounded by an adhesion promoter and a coupling agent. Among them, the adhesion promoter is at least one of organosilane, organotitanate, alkyl phosphate ester and metal organic compound, and the coupling agent is at least one of vinyl silane, amino silane and methacrylsilane. Further preferably, the mass ratio of the adhesion promoter to the coupling agent is 1:0.5 - 0.8.

[0022] In some preferred embodiments, in order to improve the water resistance and ductility of the waterborne coating, the waterborne coating further comprises an internal crosslinking emulsion, and the internal crosslinking emulsion is at least one of a room temperature self-crosslinking styrene-acrylic emulsion, a polyurethane-modified acrylate emulsion and a room temperature self-crosslinking pure acrylic emulsion; preferably, by weight, the dosage of the internal crosslinking emulsion is 5 - 15 parts.

[0023] In some preferred embodiments, in order to improve the bonding effect between the release film for pre-laid waterproofing membranes and the post-poured concrete, the waterborne coating further comprises an active filler and a powder material. The active filler is at least one of blast furnace slag, pozzolanic admixture, fly ash, calcium silicate, magnesium silicate, aluminum oxide, aluminum silicate and cement, and the powder material is at least one of light calcium powder, light bentonite and nano-aluminum borate; preferably, by weight, the dosage of the active filler is 4 - 20 parts, and the dosage of the powder material is 10 - 30 parts.

[0024] The waterborne coating of the present invention may also add at least one of pigments, ultraviolet absorbers, suspending agents, defoaming agents and dispersants according to the actual production and application requirements.

[0025] Specifically, the pigment is a waterborne color paste, and by weight, the dosage is 0 - 3 parts. The pigment can be white, black, red, gray, or color pastes of other colors can also be selected according to requirements; the ultraviolet absorber is at least one of salicylate esters, benzophenones, benzotriazoles, substituted acrylonitriles and triazines, and by weight, the dosage is 0 - 1.0 part; the defoaming agent is at least one of mineral oil defoaming agents, silicone defoaming agents and polyether defoaming agents, and by weight, the dosage is 0 - 0.5 part; the dispersant is at least one of sodium polycarboxylate, sodium tripolyphosphate and fatty acid polyethylene glycol ester, and by weight, the dosage is 0 - 0.5 part.

[0026] The present invention also provides a preparation method for the release film for pre-laid waterproofing membranes, comprising the following steps:

[0027] S1. Dip the reinforcing material in the waterborne coating, and scrape off the excess coating to a fixed thickness.

[0028] S2. Dry the reinforcing material impregnated with the waterborne coating in step S1 to obtain the anti-adhesive film for the pre-laid waterproofing membrane.

[0029] Preferably, the drying temperature in step S2 is 60 - 80 °C.

[0030] The present invention also provides the application of the above-mentioned anti-adhesive film for the pre-laid waterproofing membrane in the preparation of a pre-laid anti-adhesive waterproofing membrane.

[0031] The present invention also provides a pre-laid anti-adhesive waterproofing membrane, which is composed of a pre-laid waterproofing membrane and the above-mentioned anti-adhesive film for the pre-laid waterproofing membrane laid on the adhesive layer of the pre-laid waterproofing membrane.

[0032] Preferably, the pre-laid waterproofing membrane is an asphalt-based pre-laid waterproofing membrane and a polymer pre-laid waterproofing membrane.

[0033] The beneficial effects of the present invention are as follows:

[0034] (1) The anti-adhesive film for the pre-laid waterproofing membrane provided by the present invention is a film material with a rough surface prepared from a waterborne coating and a reinforcing material. As an anti-adhesive and weather-resistant isolation material for the pre-laid membrane, it does not require a removable release film, can be bonded to the post-cast concrete, and facilitates the watertight sealing at the lap joint of the membranes; the anti-adhesive film for the pre-laid waterproofing membrane can be prefabricated and then wound up for storage, endowing the pre-laid membrane with efficient, clean, and convenient production.

[0035] (2) The present invention uses a three-dimensional network porous membrane as the reinforcing material. The three-dimensional network porous membrane has irregular pore sizes and a three-dimensional interpenetrating cross-linked network structure, which endows the anti-adhesive and weather-resistant material with excellent anti-bending properties as the continuous skeleton after the coating forms a film.

[0036] (3) The surface of the reinforcing material of the present invention is impregnated and treated with an interfacial binder, which can make the waterborne coating have good wettability and permeability, and at the same time improve the interfacial adhesion between the waterborne coating and the reinforcing material after the coating forms a film.

[0037] (4) The water-based coating of the present invention has good ductility, can be effectively bonded to the cast-in-place concrete later, and has the characteristics of not being sticky and not cracking at high temperatures. Among them, an internal cross-linked emulsion is used as the film-forming substance of the water-based coating, which can cross-link and form a film through a chemical reaction at normal temperature, and has excellent water resistance and extensibility, solving the problem of coating stress cracking caused by the deformation of the pre-laid coil when the coating is applied to the pre-laid coil; fillers are introduced, and through gradation design, the surface structure of the coating after drying and film-forming is three-dimensional and rough, which can respectively form physical riveting points with the adhesive layer of the pre-laid coil and the cast-in-place concrete. At the same time, the addition of active fillers and powder fillers can form a chemical bonding effect with the cast-in-place concrete, and achieve effective bonding with the cast-in-place concrete through physical and chemical dual effects.

[0038] (5) The reinforcing material of the present invention is infiltrated by the water-based coating. After the infiltrated water-based coating is dried, a film material with the water-based coating as the continuous phase and the reinforcing material also as the continuous phase, and the two continuous phases are interlocked, has good anti-cracking performance and ductility. At the same time, the three-dimensional rough structure on both sides of the film can achieve physical riveting with the coil and the concrete, improving the bonding performance. Description of the Drawings

[0039] Figure 1 It is a microscope picture of the three-dimensional network pore film of the reinforcing material.

[0040] Figure 2 It is a microscope picture of the anti-adhesive film for the pre-laid waterproof coil of the present invention. Detailed Embodiments

[0041] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0042] Before further describing the specific embodiments of the present invention, it should be understood that the protection scope of the present invention is not limited to the specific embodiments described below; it should also be understood that the terms used in the embodiments of the present invention are for the purpose of describing specific embodiments, rather than limiting the protection scope of the present invention.

[0043] When the embodiments give a numerical range, it should be understood that unless otherwise specified in the present invention, any value between the two endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0044] The present invention does not limit the source of the raw materials used. Unless otherwise specified, the raw materials used in the present invention are all ordinary commercially available products in this technical field.

[0045] The reinforcing material in the present invention is a film material with a three-dimensional interpenetrating cross-linked network structure, and its pore size is an irregular pore size. As Figure 1 shown, the reinforcing material is prepared by high-temperature melting, spinning, and high-temperature ironing processes of thermoplastic resin. Among them, the thermoplastic resin is at least one of PA, EVA, TPU, PES, PP, PE, PET, PVC, PS, TPO, PC, polyphenylene ether, and polysulfone resin. The grammage of the reinforcing material is 12 - 80 g / m 2 , the thickness is 0.05 - 0.7 mm, and the pore size of the mesh is 0.01 - 5 mm. Preferably, the grammage of the reinforcing material is 15 - 60 g / m 2 , the thickness is 0.05 - 0.5 mm, and the pore size of the mesh is 0.03 - 3 mm.

[0046] The release film for pre-laid waterproofing membranes in the present invention is a film material with a rough surface prepared from a water-based coating and a reinforcing material. As Figure 2 shown, as an anti-sticking and weather-resistant isolation material for pre-laid membranes, it does not require a removable release film, can be bonded to the post-poured concrete, and facilitates the watertight sealing at the lap joints of the membranes; the release film for pre-laid waterproofing membranes can be prefabricated and then wound up for storage, endowing the pre-laid membranes with efficient, clean, and convenient production.

[0047] Example 1

[0048] The specific information of the release film for coated pre-laid waterproofing membranes is as follows in the table

[0049] The water-based coating, by weight, includes 10 parts of polymer emulsion, 20 parts of filler, and 35 parts of water; among them, the polymer emulsion is an acrylic emulsion with a Tg of -18 °C, and the filler is quartz sand with a mesh size of 60 meshes; specifically, the preparation method of the water-based coating is: adding the filler to water, dispersing at 1500 - 2000 r / min for 30 min, reducing the rotation speed to 800 r / min, adding the polymer emulsion, and dispersing for 30 min to obtain the water-based coating.

[0050] The reinforcing material is a three-dimensional network pore film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), the material is PP, the grammage is 15 g / m 2 , the irregular mesh size is 0.5 - 5 mm, and the thickness is 0.06 mm.

[0051] The preparation method of the release film for pre-laid waterproofing membranes is as follows:

[0052] (1) Place the reinforcing material on the unwinding rack for unwinding, and add the water-based coating into the dip-coating tank;

[0053] (2) Transport the reinforcing material to the dip-coating tank. After the reinforcing material is dip-coated with the water-based coating, the inside and surface of its mesh holes are both dip-coated with the water-based coating. After the dip-coating is completed, use a fixed-thickness wire bar on both sides to scrape off the excess water-based coating by fixed thickness.

[0054] (3) Transport the reinforcing material impregnated with a certain thickness of water-based coating to the oven for drying, and the oven temperature is 60 - 80 °C.

[0055] (4) After the dried reinforcing material impregnated with the water-based coating is offset, trimmed, and wound up, the anti-adhesive film for the pre-laid waterproofing coil with coating is obtained.

[0056] Example 2

[0057] Raw materials of the anti-adhesive film for the pre-laid waterproofing coil with coating:

[0058] The water-based coating, by weight, includes 30 parts of polymer emulsion, 5 parts of filler, and 20 parts of water; wherein, the polymer emulsion is a styrene-butadiene emulsion with a Tg of -7 °C, and the filler is sintered sand with a mesh size of 80 meshes; specifically, the preparation method of the water-based coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion, and disperse for 30 min to obtain the water-based coating.

[0059] The reinforcing material is a three-dimensional network pore film (purchased from Suzhou Hanruisi New Material Technology Co., Ltd.), with a material of PA, a grammage of 25 g / m 2 , the irregular mesh hole size is 0.5 - 3 mm, and the thickness is 0.15 mm.

[0060] The preparation method of the anti-adhesive film for the pre-laid waterproofing coil with coating is the same as that in Example 1.

[0061] Example 3

[0062] Raw materials of the anti-adhesive film for the pre-laid waterproofing coil with coating:

[0063] The water-based coating, by weight, includes 20 parts of polymer emulsion, 10 parts of filler, and 25 parts of water; wherein, the polymer emulsion is a VAE emulsion with a Tg of -2 °C, and the filler is river sand with a mesh size of 100 meshes; specifically, the preparation method of the water-based coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion, and disperse for 30 min to obtain the water-based coating.

[0064] The reinforcing material is a three-dimensional network pore film (purchased from Shanghai Xingxia High Polymer Products Co., Ltd.), with a material of EVA, a grammage of 60 g / m 2, the irregular mesh size is 0.3 - 2 mm and the thickness is 0.3 mm.

[0065] The preparation method of the release film for pre-laid waterproofing coil with coating is the same as that of Example 1.

[0066] Example 4

[0067] Raw materials of the release film for pre-laid waterproofing coil with coating:

[0068] The water-based coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler and 30 parts of water; wherein, the polymer emulsion is a polyurethane emulsion with Tg of -22 °C, and the filler is sea sand with a mesh number of 120 meshes; specifically, the preparation method of the water-based coating is: adding the filler to water, dispersing for 30 min at 1500 - 2000 r / min, reducing the rotation speed to 800 r / min, adding the polymer emulsion, and dispersing for 30 min to obtain the water-based coating.

[0069] The reinforcing material is a three-dimensional reticulated pore film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), the material is PET, and the grammage is 80 g / m 2 , the irregular mesh size is 0.05 - 1.4 mm and the thickness is 0.4 mm.

[0070] The preparation method of the release film for pre-laid waterproofing coil with coating is the same as that of Example 1.

[0071] Example 5

[0072] Raw materials of the release film for pre-laid waterproofing coil with coating:

[0073] The water-based coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler and 30 parts of water; wherein, the polymer emulsion is an acrylic emulsion with Tg of -8 °C and a styrene-butadiene emulsion with Tg of -7 °C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.3; the filler is sea sand with a grading of 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0.2:0.7:0.3; specifically, the preparation method of the water-based coating is: adding the filler to water, dispersing for 30 min at 1500 - 2000 r / min, reducing the rotation speed to 800 r / min, adding the polymer emulsion, and dispersing for 30 min to obtain the water-based coating.

[0074] The reinforcing material is a three-dimensional reticulated pore film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), the material is PET, and the grammage is 40 g / m 2 , the irregular mesh size is 0.1 - 1.4 mm and the thickness is 0.25 mm.

[0075] The preparation method of the release film for pre-laid waterproofing coil with coating is the same as that of Example 1.

[0076] Example 6

[0077] Raw materials of the release film for pre-laid waterproofing membranes with coating:

[0078] Waterborne coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler, and 30 parts of water; wherein, the polymer emulsion is an acrylic emulsion with Tg of -12°C and a styrene-butadiene emulsion with Tg of -27°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.6; the filler is river sand with a particle size distribution of 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0:0.3:0.7; specifically, the preparation method of the waterborne coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion, and disperse for 30 min to obtain the waterborne coating.

[0079] The reinforcing material is a three-dimensional network pore film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), with a material of PET and a grammage of 50 g / m 2 , the irregular pore size is 0.2 - 2.0 mm, and the thickness is 0.35 mm.

[0080] The preparation method of the release film for pre-laid waterproofing membranes with coating is the same as that in Example 1.

[0081] Example 7

[0082] Raw materials of the release film for pre-laid waterproofing membranes with coating:

[0083] Waterborne coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler, and 30 parts of water; wherein, the polymer emulsion is an acrylic emulsion with Tg of -8°C and a styrene-butadiene emulsion with Tg of -8°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is mullite sand with a particle size distribution of 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0.1:0.5:0.5; specifically, the preparation method of the waterborne coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion, and disperse for 30 min to obtain the waterborne coating.

[0084] The reinforcing material is a three-dimensional network pore film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd., with a material of PET and a grammage of 30 g / m 2 , the irregular pore size is 0.05 - 4 mm, and the thickness is 0.20 mm.

[0085] The preparation method of the release film for pre-laid waterproofing membranes with coating is the same as that in Example 1.

[0086] Example 8

[0087] Raw materials for the release film for pre-laid waterproof coiled materials with coating:

[0088] Water-based coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler, 5 parts of internal cross-linking emulsion, and 30 parts of water; wherein, the polymer emulsion is an acrylic emulsion with a Tg of -5°C and a styrene-butadiene emulsion with a Tg of -22°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is quartz sand with a particle size distribution of 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0.1:0.5:0.5; the internal cross-linking emulsion is a room-temperature self-crosslinking styrene-acrylic emulsion (purchased from Lubrizol Corporation); specifically, the preparation method of the water-based coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion and the internal cross-linking emulsion, and disperse for 30 min to obtain the water-based coating.

[0089] The reinforcing material is a three-dimensional network pore film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), with a material of PET and a gram weight of 60 g / m 2 , the irregular mesh size is 0.05 - 0.14 mm, and the thickness is 0.4 mm.

[0090] The surface of the reinforcing material is impregnated and treated with an adhesion promoter (alkyl phosphate, product number BETTERSOL7277) and a coupling agent (methacrylsilane, product number KH-570) with a mass ratio of 1:0.5.

[0091] The preparation method of the release film for pre-laid waterproof coiled materials with coating is the same as that in Example 1.

[0092] Example 9

[0093] Raw materials for the release film for pre-laid waterproof coiled materials with coating:

[0094] Water-based coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler, 15 parts of internal cross-linking emulsion, and 30 parts of water; wherein, the polymer emulsion is an acrylic emulsion with a Tg of -10°C and a styrene-butadiene emulsion with a Tg of -7°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is quartz sand with a particle size distribution of 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0.1:0.5:0.5; the internal cross-linking emulsion is a polyurethane-modified acrylate emulsion (purchased from Guangzhou Changhao Trading Company); specifically, the preparation method of the water-based coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion and the internal cross-linking emulsion, and disperse for 30 min to obtain the water-based coating.

[0095] The reinforcing material is a three-dimensional network porous membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd., with a material of PET and a grammage of 70 g / m 2 , the irregular mesh size is 0.05 - 2.0 mm, and the thickness is 0.5 mm.

[0096] The surface of the reinforcing material is impregnated and treated with an adhesion promoter (organic titanate, product number TCA-L38) and a coupling agent (amino silane, product number Z-6020) with a mass ratio of 1:0.8.

[0097] The preparation method of the release film for the pre-coated waterproofing membrane with coating is the same as that of Example 1.

[0098] Example 10

[0099] Raw materials of the release film for the pre-coated waterproofing membrane with coating:

[0100] The water-based coating, by weight, includes 15 parts of polymer emulsion, 15 parts of filler, 10 parts of internal cross-linking emulsion, and 30 parts of water; wherein, the polymer emulsion is an acrylic emulsion with a Tg of -10°C and a styrene-butadiene emulsion with a Tg of -7°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is quartz sand with a particle size distribution of 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0.1:0.5:0.5; the internal cross-linking emulsion is a room-temperature self-crosslinking pure acrylic emulsion (purchased from Lubrizol Corporation); specifically, the preparation method of the water-based coating is: adding the filler to water, dispersing at 1500 - 2000 r / min for 30 min, reducing the rotation speed to 800 r / min, adding the polymer emulsion and the internal cross-linking emulsion, and dispersing for 30 min to obtain the water-based coating.

[0101] The reinforcing material is a three-dimensional network porous membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), with a material of PET and a grammage of 80 g / m 2 , the irregular mesh size is 0.05 - 1.0 mm, and the thickness is 0.7 mm.

[0102] The surface of the reinforcing material is impregnated and treated with an adhesion promoter (organic silane, product number ADP-W450) and a coupling agent (vinyl silane, product number A-171) with a mass ratio of 1:0.6.

[0103] The preparation method of the release film for the pre-coated waterproofing membrane with coating is the same as that of Example 1.

[0104] Comparative Example 1

[0105] The difference between this comparative example and Example 3 is that:

[0106] The reinforcing material is a three-dimensional network porous membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), with a material of EVA and a grammage of 100 g / m 2, the irregular mesh size is 0.3 - 6 mm and the thickness is 1 mm.

[0107] Comparative Example 2

[0108] The difference between this comparative example and Example 3 is that:

[0109] The raw materials of the release film for pre-laid waterproofing membranes with coating are different:

[0110] The waterborne coating, by weight, includes 35 parts of polymer emulsion, 5 parts of filler and 25 parts of water; wherein, the polymer emulsion is an acrylic emulsion with a Tg of 5 °C, and the filler is river sand with a mesh number of 140; specifically, the preparation method of the waterborne coating is: add the filler to water, disperse at 1500 - 2000 r / min for 30 min, reduce the rotation speed to 800 r / min, add the polymer emulsion, and disperse for 30 min to obtain the waterborne coating.

[0111] Comparative Example 3

[0112] The difference between this comparative example and Example 10 is that:

[0113] The surface of the reinforcing material is impregnated and treated with an adhesion promoter (organosilane, product number ADP-W452) and a coupling agent (vinylsilane, product number SCA-V71PE) with a mass ratio of 1:1.

[0114] Comparative Example 4

[0115] The difference between this comparative example and Example 10 is that:

[0116] The dosage of the internal cross-linking emulsion in the waterborne coating is 25 parts, and the internal cross-linking emulsion is a self-cross-linking vinyl acetate copolymer emulsion.

[0117] The release films for pre-laid waterproofing membranes prepared in Examples 1 - 10 and Comparative Examples 1 - 4 were respectively laid on the modified asphalt adhesive layer of the asphalt-based pre-laid waterproofing membrane and the hot-melt pressure-sensitive adhesive layer of the polymer pre-laid waterproofing membrane. The performance of the prepared membranes was tested according to GB / T23457-2017 "Pre-laid Waterproofing Membranes", and the peel strength from the post-poured concrete and the peel strength from the post-poured concrete after immersion were respectively tested.

[0118] Meanwhile, for the test method of the thickness of the release film for pre-laid waterproofing membranes, the operation steps are as follows: First, cut the film into thin strips with a length of 20 mm - 30 mm and a width of 2 mm - 3 mm using a cutter; then place the sample vertically on the stage of the microscope with the cross-section facing up, magnify it to an appropriate multiple for taking pictures, and measure the thickness of the film material in the area without filler.

[0119] The test results are as follows:

[0120] Table 1 Performance Table of Asphalt-based Pre-laid Waterproofing Membranes

[0121]

[0122] Table 2 Performance Table of Polymer-based Pre-laid Waterproofing Membranes

[0123]

[0124]

[0125] As can be seen from the above, the release film for pre-laid waterproofing membranes of the present invention can be used to prepare asphalt-based pre-laid waterproofing membranes and polymer pre-laid waterproofing membranes, and the obtained pre-laid waterproofing membranes have a strong peel strength with the post-cast concrete, and the influence on the peel strength after immersion in water is not significant.

[0126] From Comparative Example 1 and Example 3, it can be seen that when the mesh size, thickness and mesh aperture of the reinforcing material are changed outside the scope claimed in the present invention, the release film for pre-laid waterproofing membranes obtained, when used to prepare asphalt-based pre-laid waterproofing membranes and polymer pre-laid waterproofing membranes, the peel strength with the post-cast concrete after immersion in water decreases significantly. From Comparative Example 2 and Example 3, it can be seen that when the composition of the water-based coating and the grading of the filler are changed, the release film for pre-laid waterproofing membranes obtained, when used to prepare asphalt-based pre-laid waterproofing membranes and polymer pre-laid waterproofing membranes, the peel strength with the post-cast concrete decreases significantly, and the influence on the peel strength after immersion in water is relatively large. From Comparative Example 3 and Example 10, it can be seen that when the reinforcing material is impregnated with an adhesion promoter and a coupling agent in a conventional mass ratio, the release film for pre-laid waterproofing membranes obtained, when used to prepare asphalt-based pre-laid waterproofing membranes and polymer pre-laid waterproofing membranes, the peel strength with the post-cast concrete decreases significantly, but the influence on the peel strength after immersion in water is not significant. From Comparative Example 4 and Example 10, it can be seen that when a conventional internal cross-linking emulsion is used, even if the dosage is increased, the peel strength of the asphalt-based pre-laid waterproofing membranes and polymer pre-laid waterproofing membranes prepared with it and the post-cast concrete decreases significantly.

[0127] The above is a further description of the present invention in combination with specific embodiments, but these embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention. Those skilled in the art should understand that without departing from the spirit and scope of the present invention, modifications or substitutions can be made to the details and forms of the technical solution of the present invention, but these modifications and substitutions all fall within the protection scope of the present invention.

Claims

1. An anti-adhesive film for pre-laid waterproof coiled material, which is prepared from a water-based coating and a reinforcing material, and is characterized in that, The reinforcing material is a film material with a three-dimensional interpenetrating cross-linked network structure, and the grammage of the reinforcing material is 12-80 g / m 2 , the thickness is 0.05-0.7 mm, and the pore diameter of the mesh is 0.01-5 mm; The waterborne coating, by weight, comprises 10 - 30 parts of polymer emulsion, 5 - 20 parts of filler, and water. The Tg of the polymer emulsion is < 0 °C; the filler is inorganic particles with a mesh number of 60 - 120 meshes. The polymer emulsion is at least one of acrylic emulsion, styrene - butadiene emulsion, VAE emulsion, and polyurethane emulsion; the filler is at least one of quartz sand, calcium sand, sintered sand, mullite sand, river sand, and sea sand.

2. The anti-adhesive film for pre-laid waterproof coiled material according to claim 1, characterized in that, The grading of the filler is 60 mesh - 80 mesh: 80 - 100 mesh: 100 - 120 mesh = 0 - 0.2: 0.3 - 0.7: 0.3 - 0.

7.

3. The anti-adhesive film for pre-laid waterproof coiled material according to claim 1, characterized in that, The surface of the reinforcing material is pretreated with an interfacial binder. The interfacial binder is compounded from an adhesion promoter and a coupling agent. Among them, the adhesion promoter is at least one of organosilane, organotitanate, and alkyl phosphate ester, and the coupling agent is at least one of vinylsilane and aminosilane. The mass ratio of the adhesion promoter to the coupling agent is 1: 0.5 - 0.

8. The waterborne coating, by weight, further comprises 5 - 15 parts of an internal cross - linking emulsion, and the internal cross - linking emulsion is at least one of room - temperature self - cross - linking styrene - acrylic emulsion, polyurethane - modified acrylate emulsion, and room - temperature self - cross - linking pure acrylic emulsion.

4. The anti-adhesive film for pre-laid waterproof coiled material according to claim 3, characterized in that, The coupling agent is KH - 570.

5. The anti-adhesive film for pre-laid waterproof coiled material according to claim 1, characterized in that, The waterborne coating further comprises at least one of pigment, ultraviolet absorber, suspending agent, defoaming agent, and dispersing agent.

6. The anti-adhesive film for pre-laid waterproof coiled material according to claim 1, characterized in that, The thickness of the release film for pre - laid waterproofing membrane is 0.06 - 1.0 mm.

7. A preparation method of the anti-adhesive film for pre-laid waterproof coiled material according to any one of claims 1-6, comprising the following steps: S1. Dip the reinforcing material in the waterborne coating and scrape off the excess coating by thickness control. S2. Dry the reinforcing material impregnated with the waterborne coating in step S1 to obtain the release film for pre - laid waterproofing membrane.

8. The application of the anti-adhesive film for pre-laid waterproof coiled material according to any one of claims 1-6 in the preparation of pre-laid anti-adhesive waterproof coiled material.

9. A pre-laid anti-adhesive waterproof coiled material, which is composed of a pre-laid waterproof coiled material and the anti-adhesive film for pre-laid waterproof coiled material according to any one of claims 1-6 laid on the adhesive layer of the pre-laid waterproof coiled material.

10. The pre-laid anti-adhesive waterproof coiled material according to claim 9, characterized in that, The pre - laid waterproofing membrane is an asphalt - based pre - laid waterproofing membrane and a polymer pre - laid waterproofing membrane.

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