| abstract |
The invention discloses a new method for preparing a WPU synthetic leather foam layer based on the Pickering foam template method. The key of the method is to use soft water-based polyurethane as raw material, add water-based crosslinking agent and Pickering water-based foam stabilizer-hydrophobic inorganic solid particles, and obtain Pickering water-based foam slurry containing polyurethane latex particles through high-speed emulsification; The water-based polyurethane foam layer is obtained by drying treatment. The preparation of the water-based polyurethane foam layer of the present invention adopts the Pickering water-based foam template method, the preparation process does not use any organic solvent, is clean and environmentally friendly, and is simple to operate and easier to realize industrial production; and the Pickering foam has strong interface stability, which effectively solves the problem of The problem that the pore size is difficult to control due to the aggregation and collapse of air bubbles during the drying process of the mechanical foaming method is eliminated, and the obtained synthetic leather foamed layer has good hygienic performance. |