PVC low-foamed board and manufacturing method thereof

[0027] According to the weight ratio, select 100 parts of S-700 PVC resin, 80 parts of active light calcium, 5 parts of composite lead salt stabilizer, 1.2 parts of stearic acid, 0.6 parts of oxidized polyethylene wax, and external lubricant. 0.46 parts of polyethylene wax, 0.64 parts of foaming agent AC, NaHCO 3 2.2 parts, 8 parts of ACM-01 impact modifier, 21 parts of acrylic foaming regulator, 120 parts of regrind. Add all the above-mentioned materials into a high-speed mixer, heat to 90-120°C, keep the temperature for 15 minutes, and stir evenly at high speed. After cold mixing to 25-45℃, the materials are discharged into the silo and extruded by the twin-screw extruder. The materials are foamed through the improved mold and formed together with the grid cloth laid flat in the center of the mold to form the upper and lower layers It is a PVC foam layer, and the core layer is a three-layer reinforced structure of grid cloth. After vacuum setting, cooling forming, traction an...

[0031] According to the weight ratio, select 100 parts of S-700 PVC resin, 60 parts of active light calcium, 5 parts of calcium zinc stabilizer, 1.0 part of calcium stearate, 0.5 part of oxidized polyethylene wax as internal lubricant, and 0.5 part of external lubricant. 0.55 parts of polyethylene wax, 0.60 parts of foaming agent AC, NaHCO 3 It is 2.3 parts, 9 parts of ACM-01 impact modifier, 20 parts of acrylic foaming modifier, 100 parts of regrind. Add all the above-mentioned materials into a high-speed mixer, heat to 90-120°C, keep the temperature for 15 minutes, and stir evenly at high speed. After cold mixing to 25-45℃, the materials are discharged into the silo and extruded by the twin-screw extruder. The materials are foamed through the improved mold and formed together with the grid cloth laid flat in the center of the mold to form the upper and lower layers It is a PVC foam layer, and the core layer is a three-layer reinforced structure of grid cloth. After vacuum set...

[0035] According to the weight ratio, select 100 parts of S-700 PVC resin, 10 parts of active light calcium, 4 parts of organic tin stabilizer, 0.5 parts of stearic acid for internal lubricant, 0.6 parts of oxidized polyethylene wax, and paraffin wax for external lubricant 0.8 part, 0.4 part of polyethylene wax, 0.5 part of AC as blowing agent, NaHCO 3 2.4 parts, 12 parts of ACM-01 impact modifier, 18 parts of acrylic foaming modifier, 80 parts of regrind. Add all the above-mentioned materials into a high-speed mixer, heat to 90-120°C, keep the temperature for 15 minutes, and stir evenly at high speed. After cold mixing to 25-45℃, the materials are discharged into the silo and extruded by the twin-screw extruder. The materials are foamed through the improved mold and formed together with the grid cloth laid flat in the center of the mold to form the upper and lower layers It is a PVC foam layer, and the core layer is a three-layer reinforced structure of grid cloth. After vacuu...