▎ 摘　　要

NOVELTY - Heat-insulating building wallboard comprises inner energy-absorbing buffer layer, inner thermal insulation layer, outer thermal insulation layer and outer flame-proof and flame-retardant layer arranged sequentially from the inside to the outside, and multiple sound-proof grooves are equidistantly arranged in the inner energy-absorbing buffer layer; the inner energy-absorbing buffer layer comprises PVC resin, heavy calcium carbonate, energy-absorbing buffer filler, calcium-zinc composite stabilizer, foaming agent, stearic acid and PE wax; both the inner thermal insulation layer and outer thermal insulation layer comprises PVC resin, bamboo fiber powder, heavy calcium carbonate, light moisture-proof insulation filler, calcium stearate, dodecynediol polyoxyethylene ether and calcium-zinc composite stabilizer; the outer flame-proof and flame-retardant layer comprises e.g. PVC resin, bamboo fiber powder, heavy calcium carbonate, calcium stearate, and methyl tin mercaptide. USE - Used as heat-insulating building wallboard. ADVANTAGE - The heat-insulating building wallboard: interior has good elasticity, energy absorption and cushioning, and sound insulation, and exterior has flame prevention, flame retardancy, and heat resistance; and blocks the transmission of heat and moisture by inner thermal insulation layer and the outer thermal insulation layer; and has good thermal insulation, heat insulation and moisture-proof effect. DETAILED DESCRIPTION - Heat-insulating building wallboard comprises inner energy-absorbing buffer layer, inner thermal insulation layer, outer thermal insulation layer and outer flame-proof and flame-retardant layer arranged sequentially from the inside to the outside, and multiple sound-proof grooves are equidistantly arranged in the inner energy-absorbing buffer layer; the inner energy-absorbing buffer layer comprises 95-110 pts. wt. PVC resin, 85-100 pts. wt. heavy calcium carbonate, 13-25 pts. wt. energy-absorbing buffer filler, 3-10 pts. wt. calcium-zinc composite stabilizer, 0.6-1.5 pts. wt. foaming agent, 0.5-1 pts. wt. stearic acid and 0.8-2 pts. wt. PE wax; both the inner thermal insulation layer and outer thermal insulation layer comprises 80-95 pts. wt. PVC resin, 12-20 pts. wt. bamboo fiber powder, 100-110 pts. wt. heavy calcium carbonate, 7-15 pts. wt. light moisture-proof insulation filler, 0.6-1.2 pts. wt. calcium stearate, 0.3-0.7 pts. wt. dodecynediol polyoxyethylene ether and 0.2-0.6 pts. wt. calcium-zinc composite stabilizer; the outer flame-proof and flame-retardant layer comprises 90-106 pts. wt. PVC resin, 5-12 pts. wt. bamboo fiber powder, 82-90 pts. wt. heavy calcium carbonate, 8-17 pts. wt. lightweight moisture-proof insulation filler, 0.4-0.8 pts. wt. calcium stearate, 0.3-0.7 pts. wt. dodecynediol polyoxyethylene ether and 0.2-0.6 pts. wt. methyl tin mercaptide. An INDEPENDENT CLAIM is included for manufacturing the heat-insulating building wallboard comprising (1) according to the composition of the inner energy-absorbing buffer layer, inner thermal insulation layer, the outer thermal insulation layer and the outer flame-proof and flame-retardant layer, heating and stirring at 120-130°C for 30 minutes with a high-speed mixer, cooling to 40-50°C and stirring for 10 minutes, respectively obtaining inner energy-absorbing buffer layer mixture, internal thermal insulation layer mixture, external thermal insulation layer mixture and the external flame-proof and flame-retardant layer mixture; (2) adding the internal energy-absorbing buffer layer mixture, internal thermal insulation layer mixture, external thermal insulation layer mixture and external flame-proof and flame-retardant layer mixture into the sheet extruder, extruding at 150-170°C to get the semi-finished product of the inner energy-absorbing buffer layer, semi-finished product of the inner thermal insulation layer, semi-finished product of the outer thermal insulation layer and the semi-finished product of the outer flame-proof and flame-retardant layer, and pressing together with epoxy resin glue at a pressure of 8-12 MPa to obtain the semi-finished building wallboard; (3) vacuum cooling and shaping the semi-finished product of the building wallboard to obtain the crude product of the building wallboard; and (4) rough cutting of building wallboards to specified dimensions, drilling equidistant holes inside the inner energy-absorbing buffer layer to form multiple sound-proof grooves, and bonding outer surface of the outer flame-proof and flame-retardant layer with release film to obtain a finished building wallboard.