The cell structure of polyurethane soft foam is mostly open-celled. Generally, it has the properties of low density, good elastic recovery, sound absorption, breathability, heat preservation and other properties.
It is mainly used as furniture cushioning material, vehicle seat cushioning material and various soft laminated composite cushioning materials.
Soft foam is also used in industry and civilian applications as filter materials, sound insulation materials, shock-proof materials, decorative materials, packaging materials and heat insulation materials.
1. Polyols:
Polyether polyol
2. Isocyanate:
TDI
3. Catalyst
Organometallic compounds: stannous octoate (T-9);
Tertiary amines: bis(dimethylamino)ethyl ether (commonly known as A-1), triethylenediamine (TEDA, or "A-33")
4. Foam stabilizer
In polyester-type polyurethane block foam, non-silicone surfactants are mainly used. In polyether type slabstock foam, silicone-alkylene oxide copolymers are mainly used.
5. Foaming agent
Water, methylene chloride (MC), liquid carbon dioxide