The invention discloses a nontoxic, odorless and recoverable environmentally-friendly
polyurethane foaming material and a preparation method thereof. The foaming material is characterized in that a
raw material of
polyurethane is adopted and is directly subjected to a physical
gas foaming in the presence of a physical
gas foaming agent to prepare the foaming material. The foaming material has a foaming density of 0.08-0.80 g / cm<3>, a foaming ratio of 1.5-15 times, a average
pore diameter of 10-100 [mu]m, uniform distribution of cells, wherein
diameter deviations of 95% of the cells do not exceed 10% of the average
pore diameter. In addition, the foaming material has no
surface structure and can be the foaming material with any shape. The foaming material has an adjustable softness and
hardness and excellent performance, and can be widely applicable for the fields of packaging, human protector, shoe product, automobile inner garnish, amortization
cushion,
building energy conservation, acoustic insulating material and the like. According to the present invention, the following problems that: harmful gas is discharged during the production process of the
polyurethane foaming material, and
monomer residues are harmful to
human health and cause environmental
pollution, are thoroughly solved from the source, such that a practicable development approach is provided for green
environmental protection, energy saving and emission reduction of the foaming material.