Production process of thermoplastic polyolefin waterproof membrane

Abstract

The present invention belongs to the technical field of waterproof materials, and specifically discloses a production process of thermoplastic polyolefin waterproof coiled material, including an automatic batching process, wherein the automatic batching process includes weighing the raw materials with an electronic scale, and then pumping them into a mixer using a multi-tube vacuum suction machine, wherein the raw materials include 60-90 parts of thermoplastic polyolefin resin, 10-20 parts of plasticizer, 5-15 parts of filler, 1-3 parts of antioxidant, 1-3 parts of ultraviolet absorber, and 3-6 parts of compatibilizer in parts by weight, and the mixer mixes the raw materials evenly and then sequentially performs feeding, extrusion, die extrusion casting, compounding, cooling, trimming, gluing, film-coated loose sand, and winding and packaging processes; the die extrusion casting, compounding, and gluing processes are also provided with an exhaust gas treatment process, wherein the exhaust gas treatment process first removes large particle impurities through a primary filter, and then absorbs organic waste gas through a medium efficiency filter and a high-efficiency activated carbon filter. The production process of the present invention is reasonably designed, has high production efficiency, and has stable product quality.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof materials, in particular to a production process of a thermoplastic polyolefin waterproof coiled material. Background Art

[0002] As a high-performance material, thermoplastic polyolefin (TPO) has been widely used in automobile manufacturing, industrial production and waterproofing due to its excellent weather resistance, UV resistance, high temperature resistance and ozone resistance. In waterproofing projects, TPO waterproof membranes show good waterproofing effects and long service life. However, the existing production processes still have room for improvement in terms of raw material batching accuracy, composite process diversity and refined control, environmental protection treatment effects, and coordinated improvement of overall production efficiency and product quality. For example, traditional batching may lead to deviations in raw material proportions that affect the performance of the membrane, lack of precise parameter settings for different types of composite processes, and incomplete waste gas treatment. Summary of the invention

[0003] The object of the present invention is to provide a production process of thermoplastic polyolefin waterproofing membrane to solve the above problems.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a production process of thermoplastic polyolefin waterproof coiled material, comprising an automatic batching process, wherein the automatic batching process comprises weighing the raw materials with an electronic scale and then sucking them into a mixer with a multi-tube vacuum suction machine, wherein the raw materials comprise 60-90 parts by weight of thermoplastic polyolefin resin, 10-20 parts of plasticizer, 5-15 parts of filler, 1-3 parts of antioxidant, 1-3 parts of ultraviolet absorber, and 3-6 parts of compatibilizer, and after the mixer mixes the raw materials evenly, the mixer sequentially performs the processes of loading, extrusion, die extrusion casting, compounding, cooling, trimming, gluing, film coating with loose sand, and winding and packaging; the die extrusion casting, compounding, and gluing processes are also provided with an exhaust gas treatment process, wherein the exhaust gas treatment process first removes large particle impurities through a primary filter, and then absorbs organic waste gas through a medium efficiency filter and a high-efficiency activated carbon filter.

[0005] Furthermore, the thermoplastic polyolefin resin is a mixture of one or more of ethylene-octene copolymer and ethylene-propylene copolymer, the plasticizer is one or more of dioctyl phthalate and dioctyl adipate, the filler is one or more of calcium carbonate and talc, the antioxidant is a hindered phenol antioxidant, the UV absorber is a benzotriazole UV absorber, and the compatibilizer is maleic anhydride grafted polypropylene.

[0006] Furthermore, the automatic batching process includes mixing the raw materials at 80-100° C. for 5-10 minutes, and the weight error of the raw materials is within ±0.3%.

[0007] Furthermore, the feeding process adopts a vacuum feeding device to effectively prevent impurities from being mixed into the raw materials during the transportation process.

[0008] Furthermore, the extrusion process uses a screw extruder with a screw speed of 28-42 rpm and a heating temperature of 195-230°C. The heating device in the extrusion process is a cast aluminum heating ring; the mold in the mold extrusion casting process uses a hanger-type extrusion mold.

[0009] Furthermore, the composite process includes L-type composite, H-type calendering, and P-type composite in sequence; the L-type composite includes composite the cast film jade non-woven fabric of the previous process with a hot pressing composite machine, and the hot pressing temperature of the L-type composite is 140-160°C, the pressure is 0.3-0.7MPa and the composite speed is 4-8 meters / minute; the temperature of the H-type calendering is 160-190°C, and the pressure is 1-2MPa; the P-type composite includes composite the calendered or uncalendered coil with the reinforced cloth again with a composite machine, and the temperature of the P-type composite is 150-170°C, the pressure is 0.6-1MPa, and the speed is 3-7 meters / minute.

[0010] Furthermore, the cooling process includes a cooling water tank or a spray cooling pipe, the water temperature of the cooling water tank is 8-25° C., and the coil stays in the cooling water tank for 1.5-3.5 minutes.

[0011] Furthermore, the glue coating amount in the gluing process is 80-120 g / m 2 .

[0012] Furthermore, the coating loose sand process includes using a coating machine to coat a protective film on the surface of the coiled material after glue coating, the thickness of the protective film is 0.03-0.08mm, and the loose sand in the coating loose sand process is evenly spread on the surface of the coiled material by vibration or airflow.

[0013] Furthermore, the traction speed of the traction process is 4-10 m / min, and speed-adjusting roller groups are provided between the compounding and cooling processes, between the trimming and gluing processes, and between the gluing and coating loose sand processes; an exhaust gas collection hood is used in the compounding process to collect organic exhaust gas generated during the compounding process, and the exhaust gas collection hood is connected to a multi-stage filtering device, and the multi-stage filtering device includes a primary filter, a medium-efficiency filter and a high-efficiency activated carbon filter; an exhaust gas collection system is used in the gluing process, and the exhaust gas collection system includes a condensation recovery device for recovering organic solvents, and a photocatalytic oxidation and alkali solution spraying combination device is used to treat residual harmful gases.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The production process of the present invention is reasonably designed, with high production efficiency and stable product quality;

[0016] 2. The production process of the present invention adopts an automatic batching process, which improves the accuracy of raw material ratio and ensures the production quality and product quality stability;

[0017] 3. The present invention is provided with waste gas treatment processes in the extrusion casting, compounding and gluing processes, which effectively treats the waste gas and other harmful substances generated in the production process and ensures the environmental protection and safety of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1The present invention provides a production process of thermoplastic polyolefin waterproofing coiled material, including an automatic batching process, wherein the automatic batching process includes weighing the raw materials with an electronic scale and then pumping them into a mixer using a multi-tube vacuum suction machine, wherein the raw materials include 60-90 parts of thermoplastic polyolefin resin, 10-20 parts of plasticizer, 5-15 parts of filler, 1-3 parts of antioxidant, 1-3 parts of ultraviolet absorber, and 3-6 parts of compatibilizer in parts by weight, and the mixer evenly mixes the raw materials and then sequentially performs the processes of feeding, extrusion, die extrusion casting, compounding, cooling, trimming, gluing, film coating loose sand, and winding and packaging; the die extrusion casting, compounding, and gluing processes are also provided with an exhaust gas treatment process, wherein the exhaust gas treatment process first removes large particle impurities through a primary filter, and then absorbs organic waste gas through a medium efficiency filter and a high-efficiency activated carbon filter. An automatic thickness measurement process is also provided after the compounding process to detect the thickness of the coiled material after compounding.

[0023] In some embodiments, the thermoplastic polyolefin resin is a mixture of one or more of ethylene-octene copolymer and ethylene-propylene copolymer, the plasticizer is one or more of dioctyl phthalate and dioctyl adipate, the filler is one or more of calcium carbonate and talc, the antioxidant is a hindered phenol antioxidant, the UV absorber is a benzotriazole UV absorber, and the compatibilizer is maleic anhydride grafted polypropylene.

[0024] In some embodiments, the automatic batching process includes mixing the raw materials at 80-100° C. for 5-10 minutes, and the weight error of the raw materials is within ±0.3%.

[0025] In some embodiments, the loading process uses a vacuum loading device to effectively prevent impurities from being mixed into the raw materials during the transportation process.

[0026] In some embodiments, the extrusion process uses a screw extruder with a screw speed of 28-42 rpm and a heating temperature of 195-230°C. The heating device in the extrusion process is a cast aluminum heating ring; the mold in the mold extrusion casting process uses a hanger-type extrusion mold.

[0027] In some embodiments, the composite process includes L-type composite, H-type calendering, and P-type composite in sequence; the L-type composite includes using a hot pressing composite machine to composite the cast film jade non-woven fabric of the previous process, and the hot pressing temperature of the L-type composite is 140-160°C, the pressure is 0.3-0.7MPa and the composite speed is 4-8 meters / minute; the temperature of the H-type calendering is 160-190°C, and the pressure is 1-2MPa; the P-type composite includes using a composite machine to composite the calendered or uncalendered coil with the reinforced cloth again, and the temperature of the P-type composite is 150-170°C, the pressure is 0.6-1MPa, and the speed is 3-7 meters / minute.

[0028] In some embodiments, the cooling process includes a cooling water tank or a spray cooling pipe, the water temperature of the cooling water tank is 8-25° C., and the coil stays in the cooling water tank for 1.5-3.5 minutes.

[0029] In some embodiments, the glue coating amount in the gluing process is 80-120 g / m 2 .

[0030] In some embodiments, the coating loose sand process includes using a coating machine to cover the surface of the coiled material with a protective film, the thickness of the protective film is 0.03-0.08mm, and the loose sand in the coating loose sand process is evenly spread on the surface of the coiled material by vibration or airflow.

[0031] In some embodiments, the traction speed of the traction process is 4-10 m / min, and speed-adjusting roller groups are provided between the compounding and cooling processes, between the trimming and gluing processes, and between the gluing and coating loose sand processes; an exhaust gas collection hood is used in the compounding process to collect organic waste gas generated during the compounding process, and the exhaust gas collection hood is connected to a multi-stage filtration device, and the multi-stage filtration device includes a primary filter, a medium-efficiency filter and a high-efficiency activated carbon filter; an exhaust gas collection system is used in the gluing process, and the exhaust gas collection system includes a condensation recovery device for recovering organic solvents, and a photocatalytic oxidation and alkali solution spraying combination device is used to treat residual harmful gases.

[0032] The present invention is described below by means of specific examples.

[0033] Embodiment 1: A production process of thermoplastic polyolefin waterproofing coiled material, including an automatic batching process, wherein the automatic batching process includes weighing the raw materials with an electronic scale and then pumping them into a mixer using a multi-tube vacuum suction machine, wherein the raw materials include 60 parts of thermoplastic polyolefin resin, 10 parts of plasticizer, 5 parts of filler, 1 part of antioxidant, 1 part of ultraviolet absorber, and 3 parts of compatibilizer in parts by weight, and the mixer uniformly mixes the raw materials and then sequentially performs the processes of feeding, extrusion, die extrusion casting, compounding, cooling, trimming, gluing, film-coating loose sand, and winding and packaging;

[0034] The automatic batching process includes mixing the raw materials at 80°C for 5 minutes, and the weight error of the raw materials is within ±0.3%. The feeding process adopts a vacuum feeding device to effectively prevent the raw materials from being mixed with impurities during transportation. The extrusion process adopts a screw extruder, the screw speed is 28 rpm, the heating temperature is 195°C, and the heating device in the extrusion process is a cast aluminum heating ring; the mold in the mold extrusion casting process adopts a hanger-type extrusion mold. The composite process includes L-type composite, H-type calendering, and P-type composite in sequence; the L-type composite includes using a hot pressing composite machine to composite the cast sheet jade non-woven fabric of the previous process, and the hot pressing temperature of the L-type composite is 140°C, the pressure is 0.3MPa, and the composite speed is 4 meters / minute; the temperature of the H-type calendering is 160°C and the pressure is 1MPa; the P-type composite includes using a composite machine to composite the calendered or uncalendered coil with the reinforcing cloth again, and the temperature of the P-type composite is 150°C, the pressure is 0.6MPa, and the speed is 4 meters / minute. The cooling process includes a cooling water tank or a spray cooling pipe. The water temperature of the cooling water tank is 8°C and the coil stays in the cooling water tank for 1.5 minutes. The glue coating amount in the glue coating process is 80g / m 2 . The film-coated loose sand process includes using a film-coating machine to coat a protective film on the surface of the coil after gluing, and the thickness of the protective film is 0.03mm. The loose sand in the film-coated loose sand process is evenly spread on the surface of the coil by vibration or airflow. The traction speed of the traction process is 4 meters per minute. Speed-adjusting roller groups are provided between the compounding and cooling processes, between the trimming and gluing processes, and between the gluing and film-coated loose sand processes. In the compounding process, an exhaust gas collection hood is used to collect organic waste gas generated during the compounding process. The exhaust gas collection hood is connected to a multi-stage filtering device. The multi-stage filtering device includes a primary filter, a medium-efficiency filter and a high-efficiency activated carbon filter. In the gluing process, an exhaust gas collection system is used. The exhaust gas collection system includes a condensation recovery device for recovering organic solvents, and a photocatalytic oxidation and alkali solution spraying combination device is used to treat residual harmful gases.

[0035] Embodiment 2: The difference from Embodiment 1 is that the raw materials include 90 parts of thermoplastic polyolefin resin, 20 parts of plasticizer, 15 parts of filler, 3 parts of antioxidant, 3 parts of ultraviolet absorber, and 6 parts of compatibilizer in parts by weight. The automatic batching process includes mixing the raw materials at 100°C for 10 minutes, and the weight error of the raw materials is within ±0.3%. The extrusion process uses a screw extruder with a screw speed of 42 rpm and a heating temperature of 230°C. The heating device in the extrusion process is a cast aluminum heating ring; the mold in the mold extrusion casting process uses a hanger extrusion mold. The hot pressing temperature of L-type composite is 160°C, the pressure is 0.7MPa and the composite speed is 7 meters / minute; the temperature of H-type calendering is 190°C and the pressure is 2MPa; the P-type composite includes using a composite machine to composite the calendered or uncalendered coil with the reinforcing cloth again, and the temperature of P-type composite is 170°C, the pressure is 1MPa, and the speed is 7 meters / minute. The water temperature of the cooling water tank is 25°C, and the coil stays in the cooling water tank for 3.5 minutes. The glue coating amount in the gluing process is 120g / m 2 The thickness of the protective film is 0.08 mm, and the loose sand in the coating loose sand process is evenly spread on the surface of the coil by vibration or air flow. The pulling speed of the pulling process is 7 meters per minute.

[0036] Embodiment 3: The difference from Embodiment 1 is that the raw materials include 85 parts of thermoplastic polyolefin resin, 16 parts of plasticizer, 12 parts of filler, 2 parts of antioxidant, 2 parts of ultraviolet absorber, and 4 parts of compatibilizer in parts by weight. The automatic batching process includes mixing the raw materials at 90°C for 8 minutes, and the weight error of the raw materials is within ±0.3%. The extrusion process uses a screw extruder with a screw speed of 35 rpm and a heating temperature of 210°C. The heating device in the extrusion process is a cast aluminum heating ring; the mold in the mold extrusion casting process uses a hanger extrusion mold. The hot pressing temperature of the L-type composite is 150°C, the pressure is 0.5MPa, and the composite speed is 6 meters / minute; the temperature of the H-type calendering is 180°C and the pressure is 1.5MPa; the P-type composite includes using a composite machine to composite the calendered or uncalendered coil with the reinforcing cloth again, and the temperature of the P-type composite is 160°C, the pressure is 0.8MPa, and the speed is 6 meters / minute. The water temperature of the cooling water tank is 20°C, and the coil stays in the cooling water tank for 3 minutes. The glue coating amount in the gluing process is 100g / m 2 The thickness of the protective film is 0.06 mm, and the loose sand in the coating loose sand process is evenly spread on the surface of the coil by vibration or air flow. The traction speed of the traction process is 6 meters per minute.

[0037] The performance test is carried out according to the requirements as shown in the following table:

[0038]

[0039] In summary, the thermoplastic polyolefin waterproof membrane produced by the production process of the present invention meets the standard requirements, has a reasonable process design, high production efficiency and stable product quality; the production process of the present invention adopts an automatic batching process, which improves the accuracy of the raw material ratio and ensures the production quality and product quality stability; the present invention is equipped with a waste gas treatment process in the extrusion casting, compounding and gluing processes, which effectively treats the waste gas and other harmful substances generated in the production process, and ensures environmental protection and safety in the production process.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for producing a thermoplastic polyolefin waterproofing membrane, characterized in that: The method comprises an automatic batching process, wherein the raw materials are weighed by an electronic scale and then pumped into a mixer by a multi-tube vacuum suction machine, wherein the raw materials include 60-90 parts by weight of a thermoplastic polyolefin resin, 10-20 parts by weight of a plasticizer, 5-15 parts by weight of a filler, 1-3 parts by weight of an antioxidant, 1-3 parts by weight of an ultraviolet absorber, and 3-6 parts by weight of a compatibilizer, and the mixer uniformly mixes the raw materials and then sequentially performs the processes of feeding, extrusion, die extrusion casting, compounding, cooling, trimming, gluing, film-coating loose sand, and winding and packaging; The die extrusion casting, compounding and gluing process is also provided with a waste gas treatment process, wherein the waste gas treatment process first removes large particle impurities through a primary filter, and then absorbs organic waste gas through a medium efficiency filter and a high efficiency activated carbon filter.

2. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The thermoplastic polyolefin resin is a mixture of one or more of ethylene-octene copolymer and ethylene-propylene copolymer, the plasticizer is one or more of dioctyl phthalate and dioctyl adipate, the filler is one or more of calcium carbonate and talc, the antioxidant is a hindered phenol antioxidant, the ultraviolet absorber is a benzotriazole ultraviolet absorber, and the compatibilizer is maleic anhydride grafted polypropylene.

3. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The automatic batching process includes mixing the raw materials at 80-100° C. for 5-10 minutes, and the weight error of the raw materials is within ±0.3%.

4. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The feeding process adopts a vacuum feeding device to effectively prevent the raw materials from being mixed with impurities during the transportation process.

5. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The extrusion process uses a screw extruder with a screw speed of 28-42 rpm and a heating temperature of 195-230° C. The heating device in the extrusion process is a cast aluminum heating ring; the mold in the mold extrusion casting process uses a hanger-type extrusion mold.

6. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The compounding process includes L-type compounding, H-type calendering, and P-type compounding performed in sequence; the L-type compounding includes compounding the cast film jade non-woven fabric of the previous process with a hot pressing compounding machine, and the hot pressing temperature of the L-type compounding is 140-160°C, the pressure is 0.3-0.7MPa, and the compounding speed is 4-8 meters / minute; the temperature of the H-type calendering is 160-190°C, and the pressure is 1-2MPa; the P-type compounding includes compounding the calendered or uncalendered coil with the reinforced cloth again with a compounding machine, and the temperature of the P-type compounding is 150-170°C, the pressure is 0.6-1MPa, and the speed is 3-7 meters / minute.

7. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The cooling process includes a cooling water tank or a spray cooling pipe, the water temperature of the cooling water tank is 8-25° C., and the coil stays in the cooling water tank for 1.5-3.5 minutes.

8. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The glue coating amount in the gluing process is 80-120g / m 2 .

9. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The coating loose sand process includes using a coating machine to cover the surface of the coiled material with a protective film, the thickness of the protective film is 0.03-0.08mm, and the loose sand in the coating loose sand process is evenly spread on the surface of the coiled material by vibration or airflow.

10. The process for producing thermoplastic polyolefin waterproofing membrane according to claim 1, characterized in that: The traction speed of the traction process is 4-10 meters per minute. Speed-adjusting roller groups are arranged between the compounding and cooling processes, between the trimming and gluing processes, and between the gluing and coating loose sand processes. In the compounding process, an exhaust gas collection hood is used to collect organic exhaust gas generated during the compounding process. The exhaust gas collection hood is connected to a multi-stage filtering device, and the multi-stage filtering device includes a primary filter, a medium-efficiency filter and a high-efficiency activated carbon filter. In the gluing process, an exhaust gas collection system is used, and the exhaust gas collection system includes a condensation recovery device for recovering organic solvents, and a photocatalytic oxidation and alkali solution spraying combination device is used to treat residual harmful gases.

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