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Views: 0 Author: Site Editor Publish Time: 2025-11-27 Origin: Site
Rigid block foam:
Aromatic polyester polyols: Used for applications like insulation boards for walls and roofs, and for polyisocyanurate (PIR) block foam used in construction.
Properties: Provide excellent thermal insulation, high compressive strength, and durability.
Flexible block foam:
Aliphatic polyester polyols: Used in flexible foam applications like mattresses, furniture, and automotive seating.
Properties: Contribute to durability, flexibility, and resilience.
Polymer polyols: Can be used to produce high-hardness flexible block foam with enhanced properties like flame retardancy.
Vegetable oil and rosin polyester polyols: Specialty polyols that can be used in polyurethane foam production.
Polyester polyols are reacted with isocyanates in a chemical process to create polyurethane foam.
Additives are often included to modify foam properties like flame retardancy and processing stability.
The specific formulation, including the type of polyester polyol, isocyanates, and additives, determines whether the final product is a rigid or flexible foam.
