| abstract |
The invention relates to a preparation method of high-load-bearing polyurethane soft foam, which is characterized in that: it is foamed from the following raw materials, and the components in parts by weight are: 100 parts of polyether polyol, 0.4-0.6 parts of catalyst, and stable foam. 0.9-1.5 parts of toluene diisocyanate, 35-42 parts of toluene diisocyanate, 3-7 parts of water, and 7-11 parts of toluene diisocyanate trimer. Preparation method: add the polyether polyol, catalyst, foam stabilizer and water in proportion to the material tank, stir and mix for 20s to 25s, let stand for 3 minutes, and then pour the mixture of toluene diisocyanate and toluene diisocyanate trimer into the material tank to mix, The temperature is controlled at 20°C to 25°C, and after rapid stirring for 5s to 8s, the mixture is poured into the foaming box for foaming. The prepared high-load-bearing polyurethane soft foam has low production cost, and the obtained foam has high bearing capacity, and is more suitable for fields with high requirements on foam quality. |