The invention discloses flexible
polyurethane foam and a production process for preparing the flexible
polyurethane foam. A mixture of polyether,
isocyanate, water, a catalyst and foam stabilizer is formed by reacting by means of one-step continuous foaming process, wherein the polyether consists of PPG (
polypropylene glycol) and POP (polyether
polyol), and the proportion of 2,4-TDI (
toluene diisocyanate) to 2,6-TDI, which are isomers of TDI of
isocyanate, ranges from 75-85:15-25. High-density foam with
apparent density up to 80kg / m3 is produced by means of the one-step continuous foaming process and has the advantages of high production capacity and fine
cell-opening performance as compared with molding foam. The foam produced by the process has
high density up to 80kg / m3 under the condition of
continuous production as compared with common block foam, so that the
cell diameter of the foam is thick, and the foam is high in elasticity and
bearing capacity.