▎ 摘　　要

NOVELTY - Composite foam plate comprises melamine-formaldehyde precondensate, graphene, dispersing and emulsifying agent, foaming agent, curing agent and other auxiliary agent. The molar ratio of melamine to formaldehyde in melamine-formaldehyde precondensate is 1:1.5-1:4.5. The amount of graphene is 0.1-1 wt.%. The weight ratio of dispersing and emulsifying agent and melamine formaldehyde precondensate is 1:100-10:100. The dispersing and emulsifying agent is a mixture of anionic surfactant and nonionic surfactant. The weight ratio of foaming agent and melamine-formaldehyde precondensate is 2:100-30:100. The weight ratio of curing agent and melamine-formaldehyde precondensate is 1:100-32:100. The weight ratio of other auxiliary agent and melamine-formaldehyde precondensate is 1:100-40:100. USE - Used as composite foam plate. ADVANTAGE - The plate has strong mechanical strength, shielding, uniformity and acoustic properties, and complete structure with uniform surface. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the plate, comprising (i) (ia) transferring melamine-formaldehyde precondensate into powder liquid continuous first pipeline type dynamic mixer powder inlet through powder metering conveying device, pumping desalinated water into the liquid inlet of the first pipeline-type dynamic mixer, and uniformly mixed in first pipeline-type dynamic mixer; (ib) pumping 10-50 wt.% dispersing and emulsifying agent into the liquid inlet of pipeline static mixer, metering graphene into the powder inlet of the pipeline static mixer, and uniformly mixing; and (ic) mixing liquid melamine-formaldehyde pre-condensate obtained in step (ia) and graphene emulsifier mixture dispersion obtained in step (ib), respectively transporting into second pipeline dynamic mixer and realizing efficient and uniform dispersion emulsification to obtain dispersion W1; (ii) using batch mixing kettle A/B, mixing foaming agent and curing agent formic acid, adding 50-90 wt.% dispersing and emulsifying and other auxiliary agent, and uniformly mixing to obtain dispersion W2; (iii) delivering dispersion W1 into the inlet a of the third pipeline dynamic mixer via a gear metering pump, delivering dispersion W2 into the inlet b of the third pipeline dynamic mixer via a gear metering pump, mixing and emulsifying W1 and W2 with high efficiency and uniformity in the third pipeline dynamic mixer to obtain dispersion W3 at the outlet, and transporting W1 and W2 into the high-speed dispersing emulsifier to obtain a combined dispersion W3; and (iv) pressurizing combined dispersion W3 by a gear metering pump and transporting into the feeding nozzle of the foaming furnace through a pipeline, where the conveying pipeline has electric heating function to adjust the temperature of the combined dispersion W3 into the furnace, the pressure valve is provided in front of the feeding nozzle to adjust the W3 inlet pressure, the W3 is distributed through the nozzles and introducing the electromagnetic hot plate and hot air foaming section of the foaming furnace, W3 is heated and foamed in the middle of the chain plate, the running speed of the chain plate is 2 m/minute, and the foaming time is 5-8 minutes, and introducing into the drying section of the furnace, and drying.