1. Typical formula and performance of block polyether type 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 load, kg
(38cm×35.6cm×10cm)
Transformation 25% 13.6
65% 25.6
Falling ball rebound, % 38
In recent years, in order to meet the needs of the market, some enterprises often produce foams with low density (10kg/m3). In addition, there must be a relatively high stability silicon surfactant and catalyst.
Reference formula for producing low-density ultra-low-density soft foam:
| name | Medium Density | Low density | Super low density | ||
| Continuous | box style | Continuous | box style | box style | |
| Polyether polyol | 100 | 100 | 100 | 100 | 100 |
| Water | 3.0 | 3.0 | 4.5 |
Tensile strength, kPa 124
Spring rate, % ≥ 60 Compression deformation, 75% ≤8 Oxygen index, OI% ≥ 28 Smoke Density ≤50
9. Water is the foaming agent, fully environmentally friendly Self-skin foam HCFC-141b blowing agent has been completely banned in foreign countries. CP blowing agents are flammable. HFC-245fa and HFC-365mfc blowing agents are expensive and unacceptable. The only way out is to use water as a blowing agent to synthesize environmentally friendly self-bonding skin foam. In the past, PU workers at home and abroad only paid attention to the modification of polyether and isocyanate, so the surface layer of the produced foam was unclear and dense. A set of formulas is recommended, which features:
Basic recipe:
Note: *SH-140 is our product.
Physical properties: Overall foam density 340~350kg/m3 Products: Smooth surface, clear crust, low density. px; margin: 0px; padding-left: 0px; padding-right: 0px; font: 12px/24px Arial, Verdana, sans-serif; white-space: normal; letter-spacing: normal; color: rgb(51 ,51,51); word-spacing: 0px; padding-top: 10px; -webkit-text-stroke-width: 0px”>
Note: *SH-140 is our product.
Physical properties: Overall foam density 340~350kg/m3 Products: Smooth surface, clear crust, low density. 
Scan to open our site | |