Unveiling the Secrets of PU Foam

What is PU Foam?
PU foam is short for polyurethane foam, a polymer material produced by the reaction of isocyanate and polyol. Just like yeast is needed to leaven dough, the foaming process of PU foam also requires special additives: a foaming agent to generate bubbles, a catalyst to control the reaction rate, and a stabilizer to maintain the foam structure. The final material contains up to 97% bubbles, making it both lightweight and insulating.

The Amazing Difference Between Rigid and Soft Foam

• Rigid PU Foam: The invisible thermal insulation for building exteriors, with a thermal conductivity comparable to wool, maintaining elasticity even at -40℃.
• Soft PU Foam: The gentle support in sofas, retaining 90% of its shape after 100,000 compression tests.
• Semi-rigid Foam: The energy-absorbing guardian of car dashboards, protecting occupants like a sponge during collisions.

Unexpected Applications
From refrigerator insulation to medical dressings, the cross-industry applications of PU foam are astonishing. It's used for shock absorption in the midsoles of athletic shoes, filling wind turbine blades, and even artificial organs utilize special medical-grade PU foam. This material is highly adjustable; by changing the formula, various properties can be obtained, ranging from the hardness of a gummy candy to the strength of a wooden board.