Preparation method and system for waterproof composite film

Abstract

A preparation method and system for a waterproof composite film, relating to the technical field of composite materials. In the preparation system, the end of an upper base cloth (201) extending out of a first unwinding shaft (10) and the end of a waterproof functional film (203) extending out of a second unwinding shaft (20) both pass through a first gap between a first press roller (11) and a first transmission roller (13) to obtain a first composite layer; a first gluing roller (40) is used for gluing between the upper base cloth (201) and the waterproof functional film (203); the first press roller (11) is located directly above the first transmission roller (13); the first unwinding shaft (10) is located above the second unwinding shaft (20); the first composite layer passes through a second gap between a second press roller (12) and a second transmission roller (14) after being wound around the second transmission roller (14), and the end of a lower base cloth (205) extending out of a third unwinding shaft (30) also passes through the second gap, so that the first composite layer is attached to the lower base cloth (205) to obtain a waterproof composite film; a second gluing roller (50) is used for gluing between the first composite layer and the lower base cloth (205); the second press roller (12) is located directly above the second transmission roller (14); and a winding shaft (60) is used for winding the waterproof composite film. The preparation system allows for integral forming of the waterproof composite film.

Description

A method and system for preparing a waterproof composite membrane Technical Field

[0001] The present invention relates to the technical field of composite materials, and in particular to a method and system for preparing a waterproof composite membrane. Background Art

[0002] Waterproof composite membranes currently used in the construction industry, both domestically and internationally, typically have a three-layer structure. Existing techniques for preparing such three-layer composite membranes typically involve rolling hot melt adhesive onto the functional membrane, then transferring the functional membrane and laminating it with a base fabric using rollers. The membrane is then rolled off the machine and cured to complete the initial lamination. These steps are then repeated to complete the lamination of the next base fabric layer with the functional membrane. However, this production method suffers from lengthy processes, complex processes, low production efficiency, difficulty in quality control, and high production costs.

[0003] Summary of the Invention

[0004] The embodiment of the present invention provides a method and system for preparing a waterproof composite membrane. Based on the preparation system, the waterproof composite membrane can be prepared by integrated molding, and the operation is flexible, thereby improving production efficiency and economic benefits.

[0005] In a first aspect, the present invention provides a system for preparing a waterproof composite membrane, the system comprising a first unwinding shaft, a second unwinding shaft, a third unwinding shaft, a first glue coating roller, a second glue coating roller, a first pressing roller, a second pressing roller, a first transmission roller, a second transmission roller, and a winding shaft;

[0006] The first unwinding shaft rolls up the upper base fabric, the second unwinding shaft rolls up the waterproof functional film, and the third unwinding shaft rolls up the lower base fabric;

[0007] The end of the upper base fabric extending from the first unwinding shaft and the end of the waterproof functional membrane extending from the second unwinding shaft both pass through the first gap between the first pressing roller and the first transmission roller, so that the upper base fabric and the waterproof functional membrane are bonded to each other to form a first composite layer; the first glue coating roller is used to apply glue between the upper base fabric and the waterproof functional membrane before passing through the first pressing roller; wherein, the first pressing roller is located directly above the first transmission roller; and the first unwinding shaft is located above the second unwinding shaft;

[0008] After the first composite layer passes around the second transmission roller, it passes through the second gap between the second pressure roller and the second transmission roller. The lower base fabric extends out of one end of the third unwinding shaft and passes through the second gap, so that the first composite layer is bonded to the lower base fabric to obtain the waterproof composite membrane. The second glue coating roller is used to apply glue between the first composite layer and the lower base fabric before passing through the second pressure roller. The second pressure roller is located directly above the second transmission roller.

[0009] The reel is used for reeling up the waterproof composite membrane.

[0010] Preferably, the wrap angle between the second transmission roller and the first composite layer is greater than 180°.

[0011] Preferably, the wrap angle between the second transmission roller and the first composite layer is 225°.

[0012] Preferably, the wrapping angle between the second pressing roller and the waterproof composite membrane is greater than 90°.

[0013] Preferably, the distance between the centers of the first transmission roller and the second transmission roller is 50-100 cm.

[0014] Preferably, the temperature of the first glue coating roller and the second glue coating roller are both 80-200° C., the pressure is both 50-500N, and the linear speed is both 5-30 m / min.

[0015] In a second aspect, the present invention further provides a method for preparing the waterproof composite membrane provided in the first aspect, the method comprising:

[0016] The waterproof functional film unwound from the second unwinding shaft is coated with glue on one side of the waterproof functional film by the first glue coating roller, and then passes through the first gap together with the upper base fabric unwound from the first unwinding shaft to obtain the first composite layer;

[0017] The upper base fabric in the first composite layer contacts the second transmission roller and is coated with glue on the other side of the waterproof functional membrane by the second glue coating roller before passing through the second gap. Then, the first composite layer after being coated with glue and the lower base fabric unwound from the third unwinding shaft pass through the second gap together to obtain the waterproof composite membrane; wherein, the waterproof composite membrane sequentially includes the upper base fabric, the waterproof functional membrane and the lower base fabric;

[0018] The waterproof composite membrane is rolled up by the rolling shaft.

[0019] Preferably, the upper base cloth and the lower base cloth are both waterproof fabrics; the fabric is a non-woven fabric or a woven fabric prepared from at least one of polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, polyethylene terephthalate fiber, aromatic polyamide fiber, glass fiber, and carbon fiber.

[0020] Preferably, the waterproof functional membrane is prepared from at least one of polyethylene, thermoplastic polyurethane elastomer rubber, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer, and polyethylene terephthalate.

[0021] Preferably, the thickness of the waterproof functional film is 10 to 200 μm, and the surface density is 5 to 150 g / m 2 .

[0022] Preferably, the glue coating adopts hot melt adhesive; the hot melt adhesive is at least one of EVA hot melt adhesive, PO hot melt adhesive and PUR hot melt adhesive.

[0023] Preferably, the thickness of the glue coating is 1 to 50 μm, and the amount of glue coating is 5 to 120 g / m 2 .

[0024] Preferably, the tension exerted on the first composite layer between the first transmission roller and the second transmission roller is controlled and determined according to the rotation speed of the first transmission roller, the rotation speed of the second transmission roller and the pressure of the first pressure roller;

[0025] The tension is calculated by the following formula:

[0026] Wherein, T is used to characterize the tension; E min Used to characterize the minimum elastic modulus in the upper base fabric and the waterproof functional membrane; A is used to characterize the cross-sectional area of ​​the first composite layer; ν1 is used to characterize the rotational speed of the first transmission roller; ν2 is used to characterize the rotational speed of the second transmission roller; L is used to characterize the length of the first composite layer during operation; μ is used to characterize the loss coefficient; N is used to characterize the pressure of the first pressure roller; θ is used to characterize the angle between the first composite layer and the horizontal plane during operation; L1 is used to characterize the intermediate variable; L0 is used to characterize the distance between the centers of the first transmission roller and the second transmission roller; r1 is used to characterize the radius of the first transmission roller; r2 is used to characterize the radius of the second transmission roller; wherein, ν2>ν1.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] The present invention provides a waterproof composite membrane preparation system, which uses a roller coating transfer process to integrally composite the upper and lower base fabrics and the middle waterproof functional membrane. The system adopts two roller coating transfer and lamination methods for composite. Compared with the preparation of existing composite membranes, the system reduces one composite process and one aging process, is more flexible in operation, and significantly improves production efficiency and economic benefits.

[0029] The waterproof composite membrane prepared by the present invention is composed of an upper base fabric, an upper adhesive layer, a waterproof functional membrane, a lower adhesive layer, and a lower base fabric from top to bottom. The upper and lower adhesive layers are hot melt adhesives. The waterproof composite membrane has the characteristics of high strength, high toughness, good waterproofness and weather resistance, and is particularly suitable for the airtightness treatment of the gaps in the external protective structures of ultra-low energy consumption buildings, near-zero energy consumption buildings, zero energy consumption buildings, low-carbon buildings, and zero-carbon buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic structural diagram of a waterproof composite membrane preparation system provided by an embodiment of the present invention;

[0031] FIG2 is a schematic diagram of the cross-sectional structure of a waterproof composite membrane provided by an embodiment of the present invention;

[0032] In the figure: 10 - first unwinding shaft; 20 - second unwinding shaft; 30 - third unwinding shaft; 40 - first gluing roller; 50 - second gluing roller; 11 - first pressing roller; 12 - second pressing roller; 13 - first transmission roller; 14 - second transmission roller; 60 - rewinding shaft;

[0033] 201 - upper base fabric; 202 - upper adhesive layer; 203 - waterproof functional membrane; 204 - lower adhesive layer; 205 - lower base fabric. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] An embodiment of the present invention provides a system for preparing a waterproof composite membrane, as shown in Figures 1 and 2, the system includes a first unwinding shaft 10, a second unwinding shaft 20, a third unwinding shaft 30, a first glue coating roller 40, a second glue coating roller 50, a first pressing roller 11, a second pressing roller 12, a first transmission roller 13, a second transmission roller 14, and a reeling shaft 60;

[0036] The first unwinding shaft 10 rolls up the upper base fabric 201, the second unwinding shaft 20 rolls up the waterproof functional film 203, and the third unwinding shaft 30 rolls down the lower base fabric 205;

[0037] The end of the upper base fabric extending from the first unwinding shaft 10 and the end of the waterproof functional film extending from the second unwinding shaft 20 pass through the first gap between the first pressing roller 11 and the first transmission roller 13, so that the upper base fabric and the waterproof functional film are bonded to each other to form a first composite layer; the first glue coating roller 40 is used to apply glue between the upper base fabric and the waterproof functional film before passing through the first pressing roller 11; wherein, the first pressing roller 11 is located directly above the first transmission roller 13; the first unwinding shaft 10 is located above the second unwinding shaft 20;

[0038] After the first composite layer is wound around the second transmission roller 14, it passes through the second gap between the second pressing roller 12 and the second transmission roller 14. The lower base fabric extends out of one end of the third unwinding shaft 30 and passes through the second gap, so that the first composite layer and the lower base fabric are bonded together to form a waterproof composite film. The second glue coating roller 50 is used to apply glue between the first composite layer and the lower base fabric before passing through the second pressing roller 12. The second pressing roller 12 is located directly above the second transmission roller 14.

[0039] The reel 60 is used for reeling up the waterproof composite membrane.

[0040] The waterproof composite membrane prepared based on the waterproof composite membrane preparation system shown in Figure 1 is shown in Figure 2. The waterproof composite membrane consists of an upper base fabric 201, an upper adhesive layer 202, a waterproof functional membrane 203, a lower adhesive layer 204, and a lower base fabric 205 from top to bottom.

[0041] In an embodiment of the present invention, as shown in Figure 1, the first unwinding shaft 10 and the second unwinding shaft 20 are both located on the left side of the first transmission roller 13; the reeling shaft 60 is located above the third unwinding shaft 30, and the reeling shaft 60 and the third unwinding shaft 30 are both located on the right side of the second transmission roller 14.

[0042] It should be noted that the first gap is the roller gap formed between the first pressure roller 11 and the first transmission roller 13. When passing through the first gap, the upper base cloth is located above the waterproof functional membrane; the second gap is the roller gap formed between the second pressure roller 12 and the second transmission roller 14, wherein the first composite layer passes through the second gap with the bottom of the second transmission roller 14 as the incision point, so that when passing through the second gap, the lower base cloth is located above the first composite layer, ensuring that the lower base cloth is in contact with the waterproof functional membrane, thereby obtaining a waterproof composite membrane with a three-layer structure.

[0043] According to some preferred embodiments, the wrap angle between the second driving roller 14 and the first composite layer is greater than 180° (for example, it can be 185°, 190°, 200°, 210°, 220°, 230°, 240° or 250°, etc.).

[0044] Specifically, the first composite layer passes through the second gap with the bottom of the second transmission roller 14 as the incision point. When the wrapping angle between the second transmission roller 14 and the first composite layer is greater than 180°, the highest point of the first transmission roller 13 is higher than the lowest point of the second transmission roller 14 in the vertical distance.

[0045] In an embodiment of the present invention, in order to ensure that the upper base fabric and the waterproof functional film of the first composite layer can be fully bonded, a wrapping angle between the second transmission roller and the first composite layer is further set to be greater than 180°, so that the first composite layer maintains a certain inclination angle when running between the first transmission roller and the second transmission roller, which is beneficial to the bonding between the two layers, and at the same time, the tension consistency is good and the traction is smoother, so that the first composite layer can be closely attached to the second transmission roller when passing through the second gap under the second transmission roller.

[0046] According to some more preferred embodiments, the wrap angle between the second driving roller 14 and the first composite layer is 225°.

[0047] In an embodiment of the present invention, when the wrapping angle between the second transmission roller and the first composite layer is 225°, the angle θ between the first composite layer and the horizontal plane during operation is 45°. On the one hand, this is beneficial for the first composite layer to wrap around the second transmission roller; on the other hand, the upper and lower angles between the first composite layer and the first transmission roller, and between the first composite layer and the second transmission roller are symmetrical, tension fluctuations are less likely to occur, and operation is more stable.

[0048] According to some preferred embodiments, the wrapping angle between the second pressing roller 12 and the waterproof composite membrane is greater than 90° (for example, it can be 95°, 100°, 105°, 110°, 115°, 120°, etc.).

[0049] In the embodiment of the present invention, in order to further ensure that the first composite layer is sufficiently tightly fitted to the lower base fabric and is wound onto the winding shaft, the wrapping angle between the second pressing roller and the waterproof composite film is set to be greater than 90°.

[0050] According to some preferred embodiments, the distance between the centers of the first transmission roller 13 and the second transmission roller 14 is 50 to 100 cm (for example, 50 cm, 55 cm, 60 cm, 65 cm, 70 cm, 75 cm, 80 cm, 85 cm, 90 cm, 95 cm or 100 cm).

[0051] In an embodiment of the present invention, by limiting the distance between the centers of the first and second drive rollers to 50 to 100 cm, the first composite layer is smoothly pulled to the second drive roller under tension within a certain distance range. Furthermore, to improve the lamination effect of the first composite layer, the design of this distance is designed to be no less than 50 cm. This allows the first composite layer, freshly coated with hot melt adhesive, to undergo a self-lubricating process before entering the next roller, thereby improving the lamination effect. However, if the distance is no less than 50 cm, the coating effect and tension control of the first composite layer on the second drive roller will be affected. If the distance exceeds 100 cm, space is wasted and the production cycle is increased.

[0052] According to some preferred embodiments, the temperature of the first glue coating roller 40 and the second glue coating roller 50 are both 80-200°C (for example, 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C, 120°C, 125°C, 130°C, 135°C, 140°C, 145°C, 150°C, 155°C, 160°C, 165°C, 170°C, 175°C, 180°C, 185°C, 190°C, 195°C or 200°C), and the pressure The force is 50-500N (for example, it can be 50N, 55N, 60N, 65N, 70N, 80N, 90N, 100N, 110N, 120N, 150N, 200N, 250N, 300N, 350N, 400N, 450N or 500N), and the linear speed is 5-30m / min (for example, it can be 5m / min, 10m / min, 15m / min, 20m / min, 25m / min or 30m / min).

[0053] In an embodiment of the present invention, during the two gluing processes, the temperature range of the first gluing roller and the second gluing roller is limited to 80-200°C to avoid the problem that the hot melt adhesive is easy to solidify when the temperature is too low, and to avoid the problem that the hot melt adhesive is easy to generate bubbles when the temperature is too high; at the same time, the pressure range of the first gluing roller and the second gluing roller is limited to 50-500N to avoid the situation that the pressure is too low and is not conducive to the bonding of the waterproof functional film and the upper base cloth or the bonding of the first composite layer and the lower base cloth, and to avoid the situation that the pressure is too high and the running resistance is increased to cause damage; secondly, the linear speed of the first gluing roller and the second gluing roller is limited to 5-30m / min to avoid the linear speed being too low and affecting the production capacity, and to avoid the linear speed being too high and the glue coating amount being difficult to control uniformly.

[0054] It should be noted that the first glue coating roller 40 and the second glue coating roller 50 can control the amount of glue coating by automatically adjusting the gap between the scraper and the waterproof functional film, and the amount of glue coated on both sides of the waterproof functional film can also be different; the glue coating methods on both sides of the waterproof functional film include but are not limited to full coverage, dot-shaped, and strip-shaped.

[0055] The present invention also provides a method for preparing a waterproof composite membrane, the preparation method comprising:

[0056] The waterproof functional film unwound from the second unwinding shaft is coated with glue on one side of the waterproof functional film by the first glue coating roller, and then passes through the first gap together with the upper base fabric unwound from the first unwinding shaft to obtain a first composite layer;

[0057] The upper base fabric in the first composite layer contacts the second transmission roller and is coated with glue on the other side of the waterproof functional membrane by the second glue coating roller before passing through the second gap. Then, the coated first composite layer and the lower base fabric unwound from the third unwinding shaft pass through the second gap together to obtain a waterproof composite membrane. The waterproof composite membrane includes the upper base fabric, the waterproof functional membrane, and the lower base fabric in sequence.

[0058] The waterproof composite membrane is rolled up by a roll.

[0059] According to some preferred embodiments, the upper base fabric and the lower base fabric are both waterproof fabrics; the fabric is a non-woven fabric or a woven fabric prepared from at least one of polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, polyethylene terephthalate fiber, aromatic polyamide fiber, glass fiber, and carbon fiber.

[0060] It should be noted that the at least one is any one or a mixture of any several in any proportion. The materials of the upper base fabric and the lower base fabric can be the same or different.

[0061] According to some preferred embodiments, the waterproof functional membrane is prepared from at least one of polyethylene, thermoplastic polyurethane elastomer rubber, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer, and polyethylene terephthalate.

[0062] According to some preferred embodiments, the thickness of the waterproof functional film is 10 to 200 μm (for example, 10 μm, 15 μm, 20 μm, 30 μm, 50 μm, 60 μm, 80 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm or 200 μm), and the surface density is 5 to 150 g / m 2 (For example, it can be 5g / m 2 , 5.5g / m 2 , 6g / m 2 , 8g / m 2 , 10g / m 2 , 12g / m 2 , 15g / m 2 , 20g / m 2 , 30g / m 2 , 40g / m 2 , 50g / m 2 , 60g / m 2 , 70g / m 2 , 80g / m 2 , 90g / m 2 , 100g / m 2 , 110g / m 2 , 120g / m2 , 130g / m 2 , 140g / m 2 or 150g / m 2 ).

[0063] According to some preferred embodiments, the glue is applied using hot melt adhesive; the hot melt adhesive is at least one of EVA hot melt adhesive, PO hot melt adhesive, and PUR hot melt adhesive.

[0064] According to some preferred embodiments, the thickness of the glue coating is 1 to 50 μm (for example, 1 μm, 1.5 μm, 2 μm, 3 μm, 5 μm, 6 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm), and the amount of glue coating is 5 to 120 g / m 2 (For example, it can be 5g / m 2 , 5.5g / m 2 , 7g / m 2 , 9g / m 2 , 11g / m 2 , 16g / m 2 , 18g / m 2 , 20g / m 2 , 30g / m 2 , 40g / m 2 , 50g / m 2 , 60g / m 2 , 70g / m 2 , 80g / m 2 , 90g / m 2 , 100g / m 2 , 110g / m 2 , 120g / m 2 , 130g / m 2 , 140g / m 2 or 150g / m 2 ).

[0065] According to some preferred embodiments, the tension exerted on the first composite layer between the first transmission roller and the second transmission roller is controlled and determined according to the rotation speed of the first transmission roller, the rotation speed of the second transmission roller, and the pressure of the first pressure roller;

[0066] The tension is calculated using the following formula:

[0067] Among them, T is used to represent tension; E minUsed to characterize the minimum elastic modulus in the upper base fabric and the waterproof functional membrane; A is used to characterize the cross-sectional area of ​​the first composite layer; ν1 is used to characterize the rotational speed of the first transmission roller; ν2 is used to characterize the rotational speed of the second transmission roller; L is used to characterize the length of the first composite layer during operation; μ is used to characterize the loss coefficient; N is used to characterize the pressure of the first pressure roller; θ is used to characterize the angle between the first composite layer and the horizontal plane during operation; L1 is used to characterize the intermediate variable; L0 is used to characterize the distance between the centers of the first transmission roller and the second transmission roller, L0=50~100cm; r1 is used to characterize the radius of the first transmission roller; r2 is used to characterize the radius of the second transmission roller; wherein, ν2>ν1.

[0068] It should be noted that E min Take the minimum value of the elastic modulus of the upper base fabric and the elastic modulus of the waterproof functional film. μ = μ1 + μ2, where μ1 represents the friction factor between the upper base fabric and the first pressure roller and the friction factor between the waterproof functional film and the first transmission roller, and μ2 represents the coefficient of influence of the hot melt adhesive viscosity on the first composite layer during the first interval. t represents the time it takes for the first composite layer to leave the first transmission roller and enter the second transmission roller; L represents the length of the first composite layer between the first and second transmission rollers. θ = the wrap angle between the second transmission roller and the first composite layer - 180°.

[0069] In the present invention, by determining the rotational speed of the first transmission roller, the rotational speed of the second transmission roller and the pressure of the first pressure roller, the tension received by the first composite layer can be controlled, thereby adjusting the rotational speed of the first transmission roller, the rotational speed of the second transmission roller and the pressure of the first pressure roller in real time to control the tension of the first composite layer to maintain a constant tension.

[0070] In order to more clearly illustrate the technical solutions and advantages of the present invention, a method and system for preparing a waterproof composite membrane are described in detail below through examples.

[0071] Example

[0072] The upper and lower base fabrics are made of polyethylene terephthalate fiber non-woven fabrics with a thickness of 0.55mm and a surface density of 60g / m 2 The waterproof functional membrane is made of polyethylene with a thickness of 40μm and a surface density of 50g / m 2 ; Hot melt adhesive uses EVA hot melt adhesive;

[0073] Using the preparation system shown in FIG1 , the wrapping angle between the second drive roller 14 and the first composite layer is 225°, and the angle θ between the first composite layer and the horizontal plane during operation is 45°; the wrapping angle between the second pressure roller 12 and the waterproof composite membrane is greater than 90°, and the distance between the centers of the first drive roller 13 and the second drive roller 14 is 100 cm. The method for preparing a waterproof composite membrane using this preparation system includes the following steps:

[0074] (1) Set the temperature of the first glue coating roller 40 to 100°C and the pressure to 200N. Use the first glue coating roller 40 to spread the hot melt adhesive on one side of the waterproof functional film released by the second unwinding shaft. The glue coating thickness is 12μm and the glue coating amount is 70g / m 2 , the line speed is 10m / min, and then the surface and the upper base fabric enter the first pressing roller 11 together under the action of the first transmission roller 13 for pressing to obtain the first composite layer;

[0075] (2) The first composite layer passes through the second gap between the second pressing roller 12 and the second transmission roller 14 with the bottom of the second transmission roller 14 as the incision;

[0076] (3) Set the temperature of the second glue roller 50 to 100°C and the pressure to 200N. Use the second glue roller 50 to spread the hot melt adhesive on the other side of the waterproof functional film. The glue thickness is 12μm and the glue amount is 70g / m 2 , the linear speed is 10m / min, and then the surface and the lower base fabric enter the second pressing roller 12 together under the action of the second transmission roller 14 for pressing, and finally a three-layer waterproof composite membrane is obtained;

[0077] (4) The waterproof composite film is rolled up using a roll-up shaft 60; wherein the hot melt adhesive content in the prepared waterproof composite film is 140 g / m 2 , surface density is 310g / m 2 .

[0078] It should be noted that during the process of the first and second glue coating rollers coating glue and the first and second pressing rollers applying pressure, since the pressing rollers are at room temperature, the material properties of the upper and lower base fabrics will not be changed.

[0079] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may be modified or some of the technical features thereof may be replaced with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions and the spirit and scope of the technical solutions of the various embodiments of the present invention. Any portions of the present invention not described in detail are well known to those skilled in the art.

Claims

1. A system for preparing a waterproof composite membrane, characterized in that: The preparation system comprises a first unwinding shaft, a second unwinding shaft, a third unwinding shaft, a first glue coating roller, a second glue coating roller, a first pressing roller, a second pressing roller, a first transmission roller, a second transmission roller and a winding shaft; The first unwinding shaft rolls up the upper base fabric, the second unwinding shaft rolls up the waterproof functional film, and the third unwinding shaft rolls up the lower base fabric; One end of the upper base fabric extending from the first unwinding shaft and one end of the waterproof functional film extending from the second unwinding shaft both pass through the first gap between the first pressing roller and the first transmission roller, so that the upper base fabric and the waterproof functional film are bonded to obtain a first composite layer; the first glue coating roller is used to apply glue between the upper base fabric and the waterproof functional film before passing through the first pressing roller; wherein the first pressing roller is located directly above the first transmission roller; and the first unwinding shaft is located above the second unwinding shaft; After the first composite layer is wound around the second transmission roller, it passes through the second gap between the second pressure roller and the second transmission roller, and the lower base fabric extends out of one end of the third unwinding shaft and passes through the second gap, so that the first composite layer is attached to the lower base fabric to obtain the waterproof composite film; the second glue coating roller is used to apply glue between the first composite layer and the lower base fabric before passing through the second pressure roller; wherein the second pressure roller is located directly above the second transmission roller; The reel is used for reeling up the waterproof composite membrane.

2. The preparation system according to claim 1, characterized in that: The wrapping angle between the second transmission roller and the first composite layer is greater than 180°.

3. The preparation system according to claim 1, characterized in that: The wrap angle between the second driving roller and the first composite layer is 225°.

4. The preparation system according to claim 1, characterized in that: The wrapping angle between the second pressing roller and the waterproof composite membrane is greater than 90°.

5. The preparation system according to claim 1, characterized in that: The distance between the centers of the first transmission roller and the second transmission roller is 50-100 cm.

6. The preparation system according to claim 1, characterized in that: The temperature of the first glue coating roller and the second glue coating roller are both 80-200° C., the pressure is both 50-500N, and the line speed is both 5-30m / min.

7. A method for preparing a waterproof composite membrane, characterized in that: Using the preparation system according to any one of claims 1 to 6, the preparation method comprises: The waterproof functional film unwound from the second unwinding shaft is coated with glue on one side of the waterproof functional film by the first glue coating roller, and then passes through the first gap together with the upper base fabric unwound from the first unwinding shaft to obtain the first composite layer; The upper base fabric in the first composite layer contacts the second transmission roller, and is coated with glue on the other side of the waterproof functional film by the second glue coating roller before passing through the second gap, and then the first composite layer after being coated with glue and the lower base fabric unwound from the third unwinding shaft pass through the second gap together to obtain the waterproof composite membrane; wherein the waterproof composite membrane includes the upper base fabric, the waterproof functional membrane and the lower base fabric in sequence; The waterproof composite membrane is rolled up by the rolling shaft.

8. The preparation method according to claim 7, characterized in that: The upper base fabric and the lower base fabric are both waterproof fabrics; the fabric is a non-woven fabric or a woven fabric prepared from at least one of polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, polyethylene terephthalate fiber, aromatic polyamide fiber, glass fiber, and carbon fiber.

9. The preparation method according to claim 7, characterized in that: The waterproof functional film is prepared by using at least one of polyethylene, thermoplastic polyurethane elastomer rubber, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer and polyethylene terephthalate.

10. The preparation method according to claim 7, characterized in that: The thickness of the waterproof functional film is 10 to 200 μm, and the surface density is 5 to 150 g / m 2 .

11. The preparation method according to any one of claims 7 to 10, characterized in that: The glue coating adopts hot melt adhesive; the hot melt adhesive is at least one of EVA hot melt adhesive, PO hot melt adhesive and PUR hot melt adhesive.

12. The preparation method according to any one of claims 7 to 10, characterized in that: The thickness of the glue coating is 1-50 μm, and the amount of glue coating is 5-120 g / m 2 .

Images