Polyurethane foam comes in two primary varieties: rigid and flexible.
For insulation purposes, rigid polyurethane foam is frequently utilised in refrigeration systems, appliances, and structures. It is thin, strong in compression, and has superior thermal insulation capabilities. By applying a blowing agent to form a closed-cell foam structure, stiff foam is produced, which is then solidified and rigidized.
On the other hand, flexible polyurethane foam is frequently utilised in furniture, beds, and cushions. It is manufactured using a different blowing agent that produces an open-cell foam structure, making the final product softer and more flexible than rigid foam.
Also, there are specialist polyurethane foam formulations created for certain uses, such as high-density foam for supporting structures or low-density foam for buoyancy.