1. Typical formula and performance of block polyether PU soft foam
Polyether triol 100pbw
TDI80/20 46.0pbw
Organotin catalyst 0.4pbw
Tertiary amine catalyst 0.2pbw
Silicone foam stabilizer 1.0pbw
Water 3.6pbw
Foaming aid 0~12pbw
Performance:
Foam density, kg/m3 22.4
Tensile strength, kpa 96.3
Elongation, % 220
Tear strength, N/m 385
Compression set, 50% 6
90% 6
Cave formation load, kg
(38cm×35.6cm×10cm)
Deformation 25% 13.6
65% 25.6
Falling ball rebound, % 38
In recent years, in order to meet the needs of the market, some companies often produce foam with a low density (10kg/m3). When producing ultra-low density soft foam, it is not enough to simply add foaming agents and assistant foaming agents. To achieve this, there must also be a combination of relatively high-stability silicon surfactants and catalysts.
Reference formula for producing low-density and ultra-low-density soft foam:
| Name | medium density | low density | Ultra low density | ||
| Continuous | Box type | Continuous | Box type | Box type | |
| Polyether polyol | 100 | 100 | 100 | 100 | 100 |
| Water | 3.0 | 3.0 |
Now we recommend a set of formulas, the characteristics of which are:
Basic recipe:
Note: *SH-140 is our product.
Physical properties: Overall foam density 340~350kg/m3 Product: Smooth surface, clear crust and low density. nbsp; 45pbw Note: *SH-140 is our product.
Physical properties: Overall foam density 340~350kg/m3 Product: Smooth surface, clear crust and low density. 
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