Chlorinated polyethylene self-adhesive waterproof coiled material and preparation method thereof

Abstract

The invention provides a chlorinated polyethylene self-adhesive waterproof coiled material and a preparation method thereof. The waterproof coiled material comprises an ethylene-octene polymer, linear low-density polyethylene, CPE particles, a titanium dioxide master batch, an antioxidant master batch and a PE-grade filling master batch. The amount of the pressure-sensitive adhesive covering each square meter of the waterproof coiled material is 0.2-0.4 kg; and 0.02-0.04 kg of the PE silicone oil isolating membrane is used on each square meter of the waterproof coiled material. The waterproof coiled material prepared by the method is excellent in performance; the coiled material has no crack at a low temperature of-35 DEG C; in hot air aging detection, the peeling strength is excellent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waterproofing membrane, in particular to a chlorinated polyethylene self-adhesive waterproofing membrane and a preparation method thereof. BACKGROUND

[0002] Chlorinated polyethylene (CPE) waterproofing membrane is a product with convenient installation, rapid construction and good waterproofing effect, which is suitable for waterproofing construction of various building projects, such as roof construction, ground construction, etc., and has stable waterproofing effect and no atmospheric pollution.

[0003] Self-adhesive waterproofing membrane is a new type of waterproofing material, which does not need to use additional adhesive when used, and can be firmly fixed on the base layer by directly tearing off the release film, has low requirements for environment during construction process, and has fast construction, and is currently the main waterproofing material; however, when the temperature is high, the performance of the adhesive will be greatly reduced, thereby affecting the adhesion effect of the membrane, and once the adhesion part of the waterproofing membrane falls off, it cannot be repaired, therefore, it is of great significance to provide a waterproofing membrane with good adhesion performance at high temperature.

[0004] The raw materials of chlorinated polyethylene (CPE) waterproofing membrane include resin, additives, etc., and the performance of the waterproofing membrane is improved through processes such as mixing, plasticizing, extruding, and vulcanizing of the raw materials; however, with the change of temperature and humidity environment, the performance of the resin will gradually decrease, resulting in a decrease in the adhesion, strength, etc. of the membrane, thereby affecting the self-healing property of the membrane, so that the waterproofing effect of the membrane is poor and the service life is shortened; therefore, it is of great significance to provide a waterproofing membrane with good toughness at low temperature. SUMMARY

[0005] In view of this, the present application provides a chlorinated polyethylene self-adhesive waterproofing membrane and a preparation method thereof, the waterproofing membrane comprising ethylene-octene polymer (POE) 30-40 parts, linear low density polyethylene (LLDPE0209AA) 50-60 parts, CPE particles 8-12 parts, titanium white masterbatch 2-4 parts, antioxidant masterbatch 2.5-3.5 parts, and PE grade filling masterbatch 45-55 parts; the amount of pressure-sensitive adhesive covered on each square meter of the waterproofing membrane is 0.2-0.4 kg; and the PE silicone oil release film used on each square meter of the waterproofing membrane is 0.02-0.04 kg. The waterproofing membrane prepared by the method of the present application has excellent performance; the membrane has no cracks at a low temperature of-35℃; and the peel strength is excellent in hot air aging detection.

[0006] The technical solution of the present application is as follows: A chlorinated polyethylene self-adhesive waterproofing membrane, the waterproofing membrane comprising the following components in the following weight fractions: 30-40 parts of ethylene-octene polymer (POE), 50-60 parts of linear low-density polyethylene (LLDPE0209AA), 8-12 parts of CPE granules, 2-4 parts of titanium dioxide masterbatch, 2.5-3.5 parts of antioxidant masterbatch, and 45-55 parts of PE-grade filler masterbatch. The amount of pressure-sensitive adhesive covering each square meter of waterproof membrane is 0.2-0.4 kg; The amount of PE silicone oil release film used per square meter of waterproof membrane is 0.02-0.04 kg.

[0007] Preferably, the waterproof membrane comprises the following components in parts by weight: 35 parts of ethylene-octene polymer (POE), 55 parts of linear low-density polyethylene (LLDPE0209AA), 10 parts of CPE granules, 3 parts of titanium dioxide masterbatch, 3 parts of antioxidant masterbatch, and 50 parts of PE-grade filler masterbatch.

[0008] Preferably, the amount of PE silicone oil release film used on each square meter of waterproof membrane is 0.038 kg.

[0009] The preparation method of the above-mentioned chlorinated polyethylene self-adhesive waterproof membrane includes the following steps: batching, molding, calendering and shaping, cooling and tempering, traction, adhesive application, film coating, winding, inspection, and packaging and warehousing.

[0010] Preferably, the preparation method of the chlorinated polyethylene self-adhesive waterproof membrane is as follows: (1) Ingredient preparation: Take out the required raw materials according to the formula, weigh them separately with an error of less than 1%, place them separately and label them; (2) Molding: Ethylene-octene polymer (POE), linear low-density polyethylene (LLDPE0209AA), CPE granules, titanium dioxide masterbatch, antioxidant masterbatch, and PE grade filler masterbatch are put into the mixing dryer in sequence and cold-stirred for 5-10 minutes before being put into the hopper for later use; the material in the hopper is vacuum-suctioned into the feeding side of the single screw extruder and formed into semi-finished roll A through the "coat hanger" mold; (3) Calendering and shaping: The semi-finished roll material A is introduced into a three-roll calender for trimming, cooling and shaping; the gap of the three-roll calender is adjusted according to the thickness, and the surface temperature of the upper roller is controlled at 45-50℃, the surface temperature of the middle roller is controlled at 50-55℃, and the surface temperature of the lower roller is controlled at 40-50℃. The roll material A moves from low to high in the three-roll calender to obtain the semi-finished roll material B; the speed of the three-roll calender is automatically controlled according to the extrusion speed and does not require manual adjustment. (4) Cooling and tempering: The semi-finished roll material B is passed through an 8-roll tempering roller with heat transfer oil as the medium and heat-treated at 80°C to obtain roll material C; wherein, the speed of the tempering roller is automatically adjusted according to the speed of the three-roll calender and no manual adjustment is required. (5) Traction: The roll material C is introduced into the first traction machine and the storage buffer unit for natural cooling to obtain the roll material D; the roll material D is introduced into the overcooling frame and the second traction machine to prepare for gluing. (6) Apply adhesive: Introduce roll material D into the adhesive application unit for adhesive application. The adhesive application should be uniform. Leave 8cm in the longitudinal direction without adhesive for hot welding during construction to obtain roll material E with adhesive on one side. (7) Lamination: A PE silicone oil release film is applied to the adhesive surface of roll E, ensuring no glue leakage. Then, the roll is introduced into the pressure roller, the first traction machine, and the material storage buffer unit for compaction, cooling, and shaping to obtain roll F. (8) Rewinding: Introduce roll F into the automatic winding machine, set the meter counter, start the winding machine to run automatically, and organize the sleeve, cut, apply tape, weigh automatically, and package automatically to obtain the roll; (9) Inspect the roll materials and put qualified products into the warehouse.

[0011] Preferably, in step (2), during the single-screw extrusion process, the barrel temperature is controlled at 190-210℃, with the temperature distribution increasing from low to high; the die head, metering pump, and screen changer temperatures are controlled at 200-210℃, and the flat die temperature is controlled at 210-220℃, with the temperature gradually increasing from the middle to both sides; the extrusion line speed is 4-6m / min, the metering pump inlet pressure is controlled at 1.5±1Mpa, the outlet pressure is less than 40Mpa, and the sheet thickness is input in grams according to the extrusion amount.

[0012] Preferably, in step (6), the glue box is heated 2 hours in advance, the melting temperature is controlled at 165-175℃, the temperature of the glue coating mold is set to be uniformly distributed and controlled at 145-150℃, and the temperature of the glue outlet tube is controlled at 145℃.

[0013] Waterproof membranes are rolled up using rigid paper tubes and then packaged in woven bags. When using chlorinated polyethylene (CPE) self-adhesive waterproof membranes, a pre-laid reverse bonding method or direct bonding of the adhesive layer to the substrate is adopted. The pre-laid reverse bonding method has low requirements for the substrate, while direct bonding to the substrate has higher requirements. During bonding, the flatness is checked with a 1m long straightedge, and the gaps are only allowed to change gradually and not exceed 5mm. Surface treatment involves polishing the substrate to increase its adhesion. Lay the chlorinated polyethylene self-adhesive waterproof membrane, ensuring that the membrane is tightly bonded to the substrate without wrinkles or air bubbles. Use a special roller to remove air bubbles. After the main surface is pasted, use hot air welding on the overlapping edges to ensure that the overlapping seams are firmly welded and that there are no incomplete welds.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the waterproof membrane prepared by the method of the present invention has excellent performance; the membrane does not crack at a low temperature of -35°C; and it exhibits excellent peel strength in hot air aging tests. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the product of the present invention.

[0017] In the diagram, 1-waterproof membrane, 2-pressure-sensitive adhesive, 3-release film. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0019] In the embodiments of the present invention, the ethylene-octene polymer (POE) used was purchased from ExxonMobil; the linear low-density polyethylene (LLDPE0209AA) was purchased from Shanghai Petrochemical; the CPE granules were purchased from Qingdao Kehua Technology Co., Ltd.; the titanium dioxide masterbatch and antioxidant masterbatch were purchased from Jiangsu Prite; and the PE-grade filler masterbatch was purchased from Shandong Hengkun New Material Technology Co., Ltd.

[0020] Example 1 A chlorinated polyethylene self-adhesive waterproof membrane, production batch number 24081601, product thickness 1.0mm, extrusion amount 850g; The above-mentioned waterproof membrane comprises the following components in parts by weight: 35 parts of ethylene-octene polymer (POE), 55 parts of linear low-density polyethylene (LLDPE0209AA), 10 parts of CPE granules, 3 parts of titanium dioxide masterbatch, 3 parts of antioxidant masterbatch, and 50 parts of PE-grade filler masterbatch. The density of this waterproof membrane is 1.06 kg / m³. 3 ); The specific process for preparing the above-mentioned chlorinated polyethylene self-adhesive waterproof membrane is as follows: (1) Ingredient preparation: Take out the required raw materials according to the formula, weigh them separately with an error of less than 1%, place them separately and label them; (2) Molding: Ethylene-octene polymer (POE), linear low-density polyethylene (LLDPE0209AA), CPE granules, titanium dioxide masterbatch, antioxidant masterbatch, and PE grade filler masterbatch are put into the mixing dryer in sequence, and cold-stirred for 7 minutes before being put into the hopper for later use; the material in the hopper is vacuum-suctioned into the feeding side of the single screw extruder and formed into semi-finished roll A through the "coat hanger" mold; The screw diameter of the single-screw extruder is φ150mm; In the single-screw extrusion process, The barrel temperature control is as follows: Zone 1 190℃, Zone 2 195℃, Zone 3 200℃, Zone 4 205℃, Zone 5 210℃, Zone 6 210℃, Zone 7 210℃, Zone 8 210℃; The temperature control of the machine head is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The metering pump temperature control is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The temperature control of the screen switcher is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The temperature control for the "coat hanger" mold (flat-top mold) is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃, Zone 4 205℃, Zone 5 205℃, Zone 6 205℃, Zone 7 205℃, Zone 8 205℃, Zone 9 205℃, Zone 10 205℃, Zone 11 205℃, Zone 12 205℃, Zone 13 205℃; The extrusion line speed of the "coat hanger" mold is 5m / min, the inlet pressure of the metering pump is controlled at 1.5Mpa, and the outlet pressure is 38Mpa. (3) Calendering and shaping: The semi-finished roll material A is introduced into a three-roll calender for trimming, cooling and shaping; the gap of the three-roll calender is 1.0 mm, the surface temperature of the upper roller is controlled at 48℃, the surface temperature of the middle roller is controlled at 53℃, and the surface temperature of the lower roller is controlled at 45℃. The roll material A moves from low to high in the three-roll calender to obtain the semi-finished roll material B; the speed ratio of the three-roll calender is 4 and no manual control is required. (4) Cooling and tempering: The semi-finished roll material B is passed through an 8-roll tempering roller with heat transfer oil as the medium and heat-treated at 80°C to obtain roll material C. The speed of the tempering roller is automatically adjusted according to the speed of the three-roll calender, requiring no manual adjustment. (5) Traction: The roll material C is introduced into the first traction machine and the storage buffer unit for natural cooling to obtain the roll material D; the roll material D is introduced into the overcooling frame and the second traction machine to prepare for gluing. (6) Apply adhesive: Introduce the roll material D into the adhesive application unit for adhesive application. The amount of pressure-sensitive adhesive covering each square meter of waterproof roll material is 0.25 kg. The adhesive application should be uniform. Leave 8 cm in the longitudinal direction without adhesive for hot welding during construction to obtain roll material E with adhesive on one side. Among them, the glue box is heated 2 hours in advance, the melting temperature is controlled at 170℃, the temperature of the glue coating mold is set to be evenly distributed and controlled at 150℃, and the temperature of the glue outlet tube is controlled at 145℃. (7) Lamination: A PE silicone oil release film is applied to the adhesive surface of roll E, ensuring no glue leakage. Then, the roll is introduced into the pressure roller, the first traction machine, and the material storage buffer unit for compaction, cooling, and shaping to obtain roll F. The amount of PE silicone oil release film used per square meter of waterproof membrane is 0.038 kg; (8) Rewinding: Introduce roll F into the automatic winding machine, set the meter counter, start the winding machine to run automatically, and organize the sleeve, cut, apply tape, weigh automatically, and package automatically to obtain the roll; (9) For the inspection of roll materials, the qualified roll materials shall be packaged in woven bags and put into storage; The product obtained in Example 1 has the following structure: Figure 1 The product obtained in Example 1 was tested, and the results are shown in Tables 1 and 2, as follows: Table 1 Performance test results of the product in Example 1

[0021] Table 2. Test results of self-adhesive performance of the product in Example 1.

[0022] When using the above-mentioned chlorinated polyethylene (CPE) self-adhesive waterproof membrane, the adhesive layer is directly bonded to the substrate. When bonding directly to the substrate, the requirements for the substrate are high. During the pasting process, the flatness is checked with a 1m long straightedge, and the gaps are only allowed to change gradually and not exceed 5mm. Surface treatment involves polishing the substrate to increase its adhesion. Lay the chlorinated polyethylene self-adhesive waterproof membrane, ensuring that the membrane is tightly bonded to the substrate without wrinkles or air bubbles. Use a special roller to remove air bubbles. After the main surface is pasted, use hot air welding on the overlapping edges to ensure that the overlapping seams are firmly welded and that there are no incomplete welds.

[0023] Example 2 A chlorinated polyethylene self-adhesive waterproof membrane, production batch number 24081602, product thickness 1.0mm, extrusion amount 850g; The waterproof membrane comprises the following components in parts by weight: 30 parts of ethylene-octene polymer (POE), 50 parts of linear low-density polyethylene (LLDPE0209AA), 8 parts of CPE granules, 2 parts of titanium dioxide masterbatch, 2.5 parts of antioxidant masterbatch, and 45 parts of PE-grade filler masterbatch. The density of this waterproof membrane is 1.06 kg / m³. 3 ); The specific process for preparing the above-mentioned chlorinated polyethylene self-adhesive waterproof membrane is as follows: (1) Ingredient preparation: Take out the required raw materials according to the formula, weigh them separately with an error of less than 1%, place them separately and label them; (2) Molding: Ethylene-octene polymer (POE), linear low-density polyethylene (LLDPE0209AA), CPE granules, titanium dioxide masterbatch, antioxidant masterbatch, and PE grade filler masterbatch are put into the mixing dryer in sequence, and cold-stirred for 5 minutes before being put into the hopper for later use; the material in the hopper is vacuum-suctioned into the single screw extruder and fed through the "coat hanger" mold to form semi-finished roll A; The screw diameter of the single-screw extruder is φ150mm; In the single-screw extrusion process, The barrel temperature control is as follows: Zone 1 190℃, Zone 2 195℃, Zone 3 200℃, Zone 4 205℃, Zone 5 210℃, Zone 6 210℃, Zone 7 210℃, Zone 8 210℃; The temperature control of the machine head is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The metering pump temperature control is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The temperature control of the screen switcher is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The temperature control for the "coat hanger" mold (flat-top mold) is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃, Zone 4 205℃, Zone 5 205℃, Zone 6 205℃, Zone 7 205℃, Zone 8 205℃, Zone 9 205℃, Zone 10 205℃, Zone 11 205℃, Zone 12 205℃, Zone 13 205℃; The extrusion line speed of the "coat hanger" mold is 4m / min, the inlet pressure of the metering pump is controlled at 1.4Mpa, and the outlet pressure is 35Mpa. (3) Calendering and shaping: The semi-finished roll material A is introduced into a three-roll calender for trimming, cooling and shaping; the gap of the three-roll calender is 1.0 mm, the surface temperature of the upper roller is controlled at 45℃, the surface temperature of the middle roller is controlled at 50℃, and the surface temperature of the lower roller is controlled at 40℃. The roll material A moves from low to high in the three-roll calender to obtain the semi-finished roll material B; the speed ratio of the three-roll calender is 4 and no manual control is required. (4) Cooling and tempering: The semi-finished roll material B is passed through an 8-roll tempering roller with heat transfer oil as the medium and heat-treated at 80°C to obtain roll material C. The speed of the tempering roller is automatically adjusted according to the speed of the three-roll calender, requiring no manual adjustment. (5) Traction: The roll material C is introduced into the first traction machine and the storage buffer unit for natural cooling to obtain the roll material D; the roll material D is introduced into the overcooling frame and the second traction machine to prepare for gluing. (6) Apply adhesive: Introduce the roll material D into the adhesive application unit for adhesive application. The amount of pressure-sensitive adhesive covering each square meter of waterproof roll material is 0.2 kg. The adhesive application should be uniform. Leave 8 cm in the longitudinal direction without adhesive for hot welding during construction to obtain roll material E with adhesive on one side. Among them, the glue box is heated 2 hours in advance, the melting temperature is controlled at 165℃, the temperature of the glue coating mold is set to be evenly distributed and controlled at 145℃, and the temperature of the glue outlet tube is controlled at 145℃. (7) Lamination: A PE silicone oil release film is applied to the adhesive surface of roll E, ensuring no glue leakage. Then, the roll is introduced into the pressure roller, the first traction machine, and the material storage buffer unit for compaction, cooling, and shaping to obtain roll F. The amount of PE silicone oil release film used per square meter of waterproof membrane is 0.02 kg; (8) Rewinding: Introduce roll F into the automatic winding machine, set the meter counter, start the winding machine to run automatically, and organize the sleeve, cut, apply tape, weigh automatically, and package automatically to obtain the roll; (9) For the inspection of roll materials, the qualified roll materials shall be packaged in woven bags and put into storage.

[0024] Example 3 A chlorinated polyethylene self-adhesive waterproof membrane, production batch number 24081603, product thickness 1.0mm, extrusion amount 850g; The waterproof membrane comprises the following components in parts by weight: 40 parts of ethylene-octene polymer (POE), 60 parts of linear low-density polyethylene (LLDPE0209AA), 12 parts of CPE granules, 4 parts of titanium dioxide masterbatch, 3.5 parts of antioxidant masterbatch, and 55 parts of PE-grade filler masterbatch. The density of this waterproof membrane is 1.06 kg / m³. 3 ); The specific process for preparing the above-mentioned chlorinated polyethylene self-adhesive waterproof membrane is as follows: (1) Ingredient preparation: Take out the required raw materials according to the formula, weigh them separately with an error of less than 1%, place them separately and label them; (2) Molding: Ethylene-octene polymer (POE), linear low-density polyethylene (LLDPE0209AA), CPE granules, titanium dioxide masterbatch, antioxidant masterbatch, and PE grade filler masterbatch are put into a mixing dryer in sequence, and cold-stirred for 10 minutes before being put into the hopper for later use; the material in the hopper is vacuum-suctioned into the single screw extruder and fed through a "coat hanger" mold to form semi-finished roll A; In the single-screw extrusion process, The barrel temperature control is as follows: Zone 1 190℃, Zone 2 195℃, Zone 3 200℃, Zone 4 205℃, Zone 5 210℃, Zone 6 210℃, Zone 7 210℃, Zone 8 210℃; The temperature control of the machine head is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The metering pump temperature control is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The temperature control of the screen switcher is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃; The temperature control for the "coat hanger" mold (flat-top mold) is as follows: Zone 1 205℃, Zone 2 205℃, Zone 3 205℃, Zone 4 205℃, Zone 5 205℃, Zone 6 205℃, Zone 7 205℃, Zone 8 205℃, Zone 9 205℃, Zone 10 205℃, Zone 11 205℃, Zone 12 205℃, Zone 13 205℃; The extrusion line speed of the "coat hanger" mold is 6m / min, the inlet pressure of the metering pump is controlled at 1.6Mpa, and the outlet pressure is 33Mpa. (3) Calendering and shaping: The semi-finished roll material A is introduced into a three-roll calender for trimming, cooling and shaping; the gap of the three-roll calender is 1.0 mm, the surface temperature of the upper roller is controlled at 50℃, the surface temperature of the middle roller is controlled at 55℃, and the surface temperature of the lower roller is controlled at 50℃. The roll material A moves from low to high in the three-roll calender to obtain the semi-finished roll material B; the speed ratio of the three-roll calender is 4 and no manual control is required; (4) Cooling and tempering: The semi-finished roll material B is passed through an 8-roll tempering roller with heat transfer oil as the medium and heat-treated at 80°C to obtain roll material C. The speed of the tempering roller is automatically adjusted according to the speed of the three-roll calender, requiring no manual adjustment. (5) Traction: The roll material C is introduced into the first traction machine and the storage buffer unit for natural cooling to obtain the roll material D; the roll material D is introduced into the overcooling frame and the second traction machine to prepare for gluing. (6) Apply adhesive: Introduce the roll material D into the adhesive application unit for adhesive application. The amount of pressure-sensitive adhesive covering each square meter of waterproof roll material is 0.4 kg. The adhesive application should be uniform. Leave 8 cm in the longitudinal direction without adhesive for hot welding during construction to obtain roll material E with adhesive on one side. Among them, the glue box is heated 2 hours in advance, the melting temperature is controlled at 175℃, the temperature of the glue coating mold is set to be evenly distributed and controlled at 150℃, and the temperature of the glue outlet tube is controlled at 145℃. (7) Lamination: A PE silicone oil release film is applied to the adhesive surface of roll E, ensuring no glue leakage. Then, the roll is introduced into the pressure roller, the first traction machine, and the material storage buffer unit for compaction, cooling, and shaping to obtain roll F. The amount of PE silicone oil release film used per square meter of waterproof membrane is 0.04 kg; (8) Rewinding: Introduce roll F into the automatic winding machine, set the meter counter, start the winding machine to run automatically, and organize the sleeve, cut, apply tape, weigh automatically, and package automatically to obtain the roll; (9) For the inspection of roll materials, the qualified roll materials shall be packaged in woven bags and put into storage.

[0025] The waterproof membrane is rolled up using a rigid paper tube and then packaged in a woven bag. When using the chlorinated polyethylene (CPE) self-adhesive waterproof membrane of this invention, a pre-laid reverse bonding method or direct bonding of the adhesive layer to the substrate is adopted. The pre-laid reverse bonding method has low requirements for the substrate, while direct bonding to the substrate has higher requirements. During bonding, the flatness is checked with a 1m long straightedge, and the gaps are only allowed to change gradually and not exceed 5mm. Surface treatment involves polishing the substrate to increase its adhesion. Lay the chlorinated polyethylene self-adhesive waterproof membrane, ensuring that the membrane is tightly bonded to the substrate without wrinkles or air bubbles. Use a special roller to remove air bubbles. After the main surface is pasted, use hot air welding on the overlapping edges to ensure that the overlapping seams are firmly welded and that there are no incomplete welds.

[0026] Although the present invention has been described in detail with reference to preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A chlorinated polyethylene self-adhesive waterproof membrane, characterized in that, The components include the following parts by weight: 30-40 parts of ethylene-octene polymer, 50-60 parts of linear low-density polyethylene, 8-12 parts of CPE granules, 2-4 parts of titanium dioxide masterbatch, 2.5-3.5 parts of antioxidant masterbatch, and 45-55 parts of PE-grade filler masterbatch; The amount of pressure-sensitive adhesive covering each square meter of waterproof membrane is 0.2-0.4 kg; The amount of PE silicone oil release film used per square meter of waterproof membrane is 0.02-0.04 kg.

2. The chlorinated polyethylene self-adhesive waterproof membrane as described in claim 1, characterized in that, The waterproof membrane comprises the following components in parts by weight: 35 parts of ethylene-octene polymer, 55 parts of linear low-density polyethylene, 10 parts of CPE granules, 3 parts of titanium dioxide masterbatch, 3 parts of antioxidant masterbatch, and 50 parts of PE-grade filler masterbatch.

3. The chlorinated polyethylene self-adhesive waterproof membrane as described in claim 1, characterized in that, The amount of PE silicone oil release film used per square meter of waterproof membrane is 0.038 kg.

4. The method for preparing chlorinated polyethylene self-adhesive waterproof membrane as described in claim 1, characterized in that, The process is as follows: ingredient preparation, molding, calendering and setting, cooling and tempering, traction, gluing, film coating, winding, inspection, packaging and warehousing.

5. The method for preparing chlorinated polyethylene self-adhesive waterproof membrane as described in claim 4, characterized in that, The preparation method of the chlorinated polyethylene self-adhesive waterproof membrane is as follows: (1) Ingredient preparation: Take out the required raw materials according to the formula, weigh them separately with an error of less than 1%, place them separately and label them; (2) Molding: Ethylene-octene polymer, linear low-density polyethylene, CPE granules, titanium dioxide masterbatch, antioxidant masterbatch, and PE grade filler masterbatch are put into the mixing dryer in sequence, and cold-stirred for 5-10 minutes before being put into the hopper for later use; the material in the hopper is vacuum-suctioned into the feeding side of the single screw extruder and formed into semi-finished roll A through the "coat hanger" mold. (3) Calendering and shaping: The semi-finished roll material A is introduced into a three-roll calender for trimming, cooling and shaping; the gap of the three-roll calender is adjusted according to the thickness, and the surface temperature of the upper roller is controlled at 45-50℃, the surface temperature of the middle roller is controlled at 50-55℃, and the surface temperature of the lower roller is controlled at 40-50℃. The roll material A moves from low to high in the three-roll calender to obtain the semi-finished roll material B; the speed of the three-roll calender is automatically controlled according to the extrusion speed and does not require manual adjustment. (4) Cooling and tempering: The semi-finished roll material B is passed through an 8-roll tempering roller with heat transfer oil as the medium and heat-treated at 80°C to obtain roll material C; wherein, the speed of the tempering roller is automatically adjusted according to the speed of the three-roll calender and no manual adjustment is required. (5) Traction: The roll material C is introduced into the first traction machine and the storage buffer unit for natural cooling to obtain the roll material D; the roll material D is introduced into the overcooling frame and the second traction machine to prepare for gluing. (6) Apply adhesive: Introduce roll material D into the adhesive application unit for adhesive application. The adhesive application should be uniform. Leave 8cm in the longitudinal direction without adhesive for hot welding during construction to obtain roll material E with adhesive on one side. (7) Lamination: A PE silicone oil release film is applied to the adhesive surface of roll E, ensuring no glue leakage. Then, the roll is introduced into the pressure roller, the first traction machine, and the material storage buffer unit for compaction, cooling, and shaping to obtain roll F. (8) Rewinding: Introduce roll F into the automatic winding machine, set the meter counter, start the winding machine to run automatically, and organize the sleeve, cut, apply tape, weigh automatically, and package automatically to obtain the roll; (9) Inspect the roll materials and put qualified products into the warehouse.

6. The method for preparing chlorinated polyethylene self-adhesive waterproof membrane as described in claim 5, characterized in that, In step (2), during the single-screw extrusion process, the barrel temperature is controlled at 190-210℃, with the temperature distribution increasing from low to high; the die head, metering pump, and screen changer temperatures are controlled at 200-210℃, and the flat die temperature is controlled at 210-220℃, with the temperature gradually increasing from the middle to both sides; the extrusion line speed is 4-6m / min, the metering pump inlet pressure is controlled at 1.5±1Mpa, the outlet pressure is less than 40Mpa, and the sheet thickness is input in grams according to the extrusion amount.

7. The method for preparing chlorinated polyethylene self-adhesive waterproof membrane as described in claim 5, characterized in that, In step (6), the glue box is heated 2 hours in advance, the melting temperature is controlled at 165-175℃, the temperature of the glue coating mold is set to be evenly distributed and controlled at 145-150℃, and the temperature of the glue outlet tube is controlled at 145℃.

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