What are the factors that influence the performance of polyurethane foam

polyurethanefoam materialis based on isocyanate and polyetherPolyol is the main raw material. Under the action of foaming agent, catalyst, flame retardant and other additives, it is mixed through special equipment and foamed on-site through high-pressure spraying. Molecular polymers, divided into polyurethanesSoft foamMaterialandPolyurethaneHard foam MaterialTwo kinds, among which, font>Soft foam Material is an open-cell structure, hard foamMaterialis a closed cell structure, and Soft foamMaterial is divided into knots There are two types: skinned and non-skinned.

Polyurethane Soft foamMaterial‘s main function is buffering, thereforeCommonly used in sofa furniture, pillows, cushions, toys, clothingandSoundproof lining. Polyurethane rigid foammaterials is a new synthetic material with thermal insulation and waterproof functions Material, its thermal conductivityvery font>low, equivalent to half of the extruded board, It has the lowest thermal conductivity among all current insulation materials. Rigid polyurethane foam is mainly used in constructionAdd appropriate amount during production and foaming process Antioxidants (can be font>PolyurethaneThe combustion temperature of foam products increases to more than 180℃, span>antioxidantThe amount added is related to the amount of water added),improvePolyurethaneThe burning temperature of foam products, Thus effectively Avoid the occurrence of heartburn.

8. Color valueGood and bad influences

The color value is polyetherPolyolThe most intuitive appearance indicator, the color value can directly reflect the polyetherpolyolquality. Polyetherpolyol The carbon atoms on the ether bond are extremely easy occurrenceoxidation, especiallywhenIn alkaline media and higher temperaturesConditions下When a reaction occurs, will cause an increase in side effects, Thusgenerates unsaturated bonds. If the color valueComparisondeep, then the corresponding other indicators (such asacid value andunsaturation and other indicators) will also be corresponding地changes, causingThe polyurethaneFoam products are colored accordingly地Changes have occurred.