Ladies and gentlemen, is the sofa foam polyurethane foam? Thank you, God helped

There are two reactions when polyurethane foaming, one is cross-linking reaction, but gas production reaction (or physical or chemical), the cell structure of polyurethane rigid foam has closed cells and open cells, and the reaction is an exothermic reaction, resulting in retraction reasons: 1. Gas shrinkage in closed cells. 2. The open gas escapes, and the cross-linking reaction is not completely completed.

Improper proportioning of serious collapsed holes. Polyurethane foams are available in both hard and soft forms. The hard one is generally used as an insulation material, a bit like the packaging foam of a refrigerator (the white kind).

Soft, everywhere, sofas, cushions, mattresses. Polyurethane foam is available in both rigid and soft foams. Polyurethane material has a certain hardness after foaming, generally rigid foam, such as solar energy, refrigerator and other interlayer insulation polyurethane used in rigid foam polyurethane; Polyurethane insulation products such as buried pipelines, polyurethane insulation boards, and pipes are also rigid foams.

Polyurethane material has a great softness after foaming, and it is generally soft foam, such as car cushions and sports equipment made of polyurethane.