STRONG-SUPPORT HIGH-ELASTICITY SOFT POLYURETHANE FOAM MATERIAL AND PREPARATION METHOD THEREFOR

The present application relates to flexible polyurethane foam materials, and particularly to a flexible polyurethane foam material with strong support and high elasticity and a preparation method thereof, which belongs to the technical field of flexible polyurethane foam production. A flexible polyurethane foam material with strong support and high elasticity of the present invention is made by foaming the following raw materials by weight: 80-120 parts of lignin-based block copolymer molecular-level combined polyether; 45-65 parts of isocyanate; 0.5-5 parts of foaming catalyst; 1-10 parts of water; and 1-3 parts of foam stabilizer; the lignin-based block copolymer molecular-level combined polyether is based on lignosulfonate, molecular chain of lignosulfonate is cut and embedded by using solvation effect of polyether polyol to form a molecular-level combined polyether that is polymerized and formed by aromatic polymer fragments of lignosulfonate and aliphatic polymer fragments of polyether polyol. The foaming catalyst can be a foaming catalyst commonly used in the technical field.