\nStorage Conditions<\/td>\n | Cool and dry places to avoid direct sunlight<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n2.2 Main functions<\/h3>\n\n- Accelerating reaction<\/strong>: PC-5 can significantly accelerate the polyurethane foaming reaction and shorten the production cycle. <\/li>\n
- Improve the foam structure<\/strong>: By optimizing the reaction rate, PC-5 helps to form a uniform and fine foam structure, improving the mechanical and thermal insulation properties of the product. <\/li>\n
- Improving Production Efficiency<\/strong>: Reduce waiting time in the production process and improve productionefficiency. <\/li>\n<\/ul>\n
3. Raw material selection<\/h2>\n3.1 Polyol<\/h3>\nPolyols are one of the main raw materials for polyurethane rigid foam, and their choice directly affects the performance of the product. Commonly used polyols include polyether polyols and polyester polyols. <\/p>\n \n\nPolyol Type<\/th>\n | Features<\/th>\n | Applicable scenarios<\/th>\n<\/tr>\n | \n\nPolyether polyol<\/td>\n | Low viscosity, high reactivity<\/td>\n | Building insulation, cold chain<\/td>\n<\/tr>\n | \nPolyester polyol<\/td>\n | Good mechanical properties and high heat resistance<\/td>\n | Car interior, home appliances<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n3.2 Isocyanate<\/h3>\nIsocyanate is another main raw material for polyurethane rigid foam. Commonly used isocyanates include MDI (diphenylmethane diisocyanate) and TDI (diisocyanate). <\/p>\n \n\nIsocyanate Type<\/th>\n | Features<\/th>\n | Applicable scenarios<\/th>\n<\/tr>\n | \n\nMDI<\/td>\n | High reaction activity and high foam strength<\/td>\n | Building insulation, cold chain<\/td>\n<\/tr>\n | \nTDI<\/td>\n | Moderate reaction activity and good foam elasticity<\/td>\n | Car interior, home appliances<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n3.3 Foaming agent<\/h3>\nThe selection of foaming agent has an important influence on the density and thermal insulation properties of foam products. Commonly used foaming agents include physical foaming agents and chemical foaming agents. <\/p>\n \n\nFrothing agent type<\/th>\n | Features<\/th>\n | Applicable scenarios<\/th>\n<\/tr>\n | \n\nPhysical foaming agent<\/td>\n | Environmentally friendly, high foaming efficiency<\/td>\n | Building insulation, cold chain<\/td>\n<\/tr>\n | \nChemical foaming agent<\/td>\n | Good foaming effect and low cost<\/td>\n | Car interior, home appliances<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n3.4 Catalyst<\/h3>\nThe selection of catalyst is crucial to the production process and product performance of polyurethane rigid foam. PC-5 as oneA highly efficient catalyst can significantly optimize the production process. <\/p>\n \n\nCatalytic Type<\/th>\n | Features<\/th>\n | Applicable scenarios<\/th>\n<\/tr>\n | \n\nPC-5<\/td>\n | High reaction activity and uniform foam structure<\/td>\n | Building insulation, cold chain, automotive interior, home appliances<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n4. Production process optimization<\/h2>\n4.1 Formula Design<\/h3>\nReasonable formula design is the basis for optimizing production processes. Here is an example of a typical polyurethane hard foam formula:<\/p>\n \n\nRaw Materials<\/th>\n | Proportion (%)<\/th>\n<\/tr>\n | \n\nPolyol<\/td>\n | 60-70<\/td>\n<\/tr>\n | \nIsocyanate<\/td>\n | 30-40<\/td>\n<\/tr>\n | \nFrothing agent<\/td>\n | 5-10<\/td>\n<\/tr>\n | \nCatalytic PC-5<\/td>\n | 0.5-1.5<\/td>\n<\/tr>\n | \nOther additives<\/td>\n | 1-2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n4.2 Mixing and foaming<\/h3>\nMixing and foaming are key steps in the production of polyurethane rigid foam. The use of PC-5 catalyst can significantly improve mixing efficiency and foaming quality. <\/p>\n \n- Raw Material Mixing<\/strong>: Mix the polyol, isocyanate, foaming agent, catalyst PC-5 and other additives in proportion and stir evenly. <\/li>\n
- Foaming reaction<\/strong>: Inject the mixed raw materials into the mold or spray them on the substrate to perform the foaming reaction. PC-5 catalyst can accelerate reaction and shorten foaming time. <\/li>\n
- Currect<\/strong>: After foaming is completed, the product is cured in the mold to form a stable foam structure. <\/li>\n<\/ol>\n
4.3 Temperature control<\/h3>\nTemperature control has an important impact on the production process and product performance of polyurethane rigid foam. When using PC-5 catalyst, it is recommended to control the following temperature parameters:<\/p>\n \n\nProcess Stage<\/th>\n | Temperature range (\u00b0C)<\/th>\n<\/tr>\n<\/thead>\n | \n\nRaw Material Mix<\/td>\n | 20-30<\/td>\n<\/tr>\n | \nFoaming Reaction<\/td>\n | 30-50<\/td>\n<\/tr>\n | \nCure<\/td>\n | 50-80<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n4.4 Pressure Control<\/h3>\nPressure control has an important influence on the density and structural uniformity of foam products. When using PC-5 catalyst, it is recommended to control the following pressure parameters:<\/p>\n \n\nProcess Stage<\/th>\n | Pressure Range (MPa)<\/th>\n<\/tr>\n | \n\nRaw Material Mix<\/td>\n | 0.1-0.3<\/td>\n<\/tr>\n | \nFoaming Reaction<\/td>\n | 0.2-0.5<\/td>\n<\/tr>\n | \nCure<\/td>\n | 0.1-0.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n5. Finished product inspection<\/h2>\n5.1 Appearance Inspection<\/h3>\nAppearance inspection is the first step in finished product inspection, mainly checking the surface quality, color and size of the product. <\/p>\n \n\nInspection items<\/th>\n | Standard Requirements<\/th>\n<\/tr>\n | \n\nSurface Quality<\/td>\n | No bubbles, cracks, depressions<\/td>\n<\/tr>\n | \nColor<\/td>\n | Alternative<\/td>\n<\/tr>\n | \nSize<\/td>\n | Meet the design requirements<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n5.2 Density Test<\/h3>\nDensity is an important indicator for measuring the performance of polyurethane hard foam products. Products produced using PC-5 catalysts should have a uniform density distribution. <\/p>\n \n\nInspection items<\/th>\n | Standard Requirements (kg\/m\u00b3)<\/th>\n<\/tr>\n | \n\nDensity<\/td>\n | 30-50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n5.3 Mechanical performance inspection<\/h3>\nMechanical performance inspection includes indicators such as compressive strength, tensile strength and flexural strength. <\/p>\n \n\n\nInspection items<\/th>\n | Standard Requirements (MPa)<\/th>\n<\/tr>\n | \n\nCompressive Strength<\/td>\n | 0.2-0.5<\/td>\n<\/tr>\n | \nTension Strength<\/td>\n | 0.1-0.3<\/td>\n<\/tr>\n | \nBending Strength<\/td>\n | 0.3-0.6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n5.4 Thermal insulation performance inspection<\/h3>\nThermal insulation performance is an important performance indicator of polyurethane rigid foam products. Products produced using PC-5 catalysts should have good thermal insulation properties. <\/p>\n \n\nInspection items<\/th>\n | Standard Requirements (W\/m\u00b7K)<\/th>\n<\/tr>\n | \n\nThermal conductivity<\/td>\n | 0.02-0.03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n5.5 Durability Inspection<\/h3>\nDurability inspection includes indicators such as heat resistance, moisture resistance and aging resistance. <\/p>\n \n\nInspection items<\/th>\n | Standard Requirements<\/th>\n<\/tr>\n | \n\nHeat resistance<\/td>\n | No deformation at 80\u00b0C<\/td>\n<\/tr>\n | \nWett resistance<\/td>\n | No deformation under 95% RH<\/td>\n<\/tr>\n | \nAging resistance<\/td>\n | No color change for 1000 hours<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n6. Conclusion<\/h2>\nBy rationally selecting raw materials, optimizing production processes and strict finished product inspection, the use of polyurethane hard bubble catalyst PC-5 can significantly improve the performance and production efficiency of rigid foam products. PC-5 catalysts perform well in accelerating reactions, improving foam structure and improving production efficiency. They are suitable for building insulation, cold chain, automotive interiors and home appliances. 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