Rigid Polyurethane Blend Polyols for Wood Imitation
Rigid Polyurethane Blend Polyols for Wood Imitation
DmcWood 1841
DmcWood 1841 is a two-components closed-cell polyurethane foam system. This product is water based system which premixed with polyether polyols, silicone surfactant, catalysts and water etc., it is suitable for injection use for wood imitation production.
Physical Properties
| Items | Units | Specifications | DmcIso 1800 |
| Appearance | By visual | Light yellow transparent liquid |
Brown liquid |
| Viscosity,25℃ | mPa.s | 600-1000 | 150-250 |
| Specific gravity,20℃ | g/ml | 1.08±0.05 |
1.24±0.01 |
| Shelf Life | Month | 6 | 12 |
| Packing | Kg/drum | 200-220 | 250 |
Reaction Performance（by hands)
| Items | Units | Specifications |
| DmcWood 1841 | g | 100 |
| DmcIso 1800 | g | 100-120 |
| Cream time | sec | 10-20 |
| Gel time | sec | 60-120 |
| Track free time | sec | ＞80 |
| Free rise density | Kg/m3 | ＞100 |
Processing informations
| Item | Unit | Specification |
| Component temperature | ℃ | 25±3 |
| Environment temperature | ℃ | ≥15 |
| Mold temperature | ℃ | 40±5 |
| Dynamic pressure | kPa | 140±10 |
It is recommended to utilize high pressure foaming machinery. The chemicals should be adjusted to the correct temperature between 22-27℃ to ensure reactivity and viscosity suitable for processing.
The mixing pressure has to be set for both components at 130-150 bar.
The mould temperature recommended is 35-45℃ to guarantee good foam performances.
Foam Performances
| Items | Units | Specifications | Test Standard |
| Mold Density | Kg/m3 | ≥200 | ASTM D1622 |
| Compressive Strength | MPa | ≥2 | ASTM D1621 |
| Surface Hardness | Shore D | ≥35 | / |
| Closed Cell Rate | % | ≥90 | ASTM D2856 |
| Water Absorption | % | ≤2 | ASTM C209-12 |
| Dimensional Stability,-20℃*24h
70℃*90%RH*24h |
% | ≤2 | ASTM D2126 |
The above testing data have been generated in lab or field conditions which are typical for this application. They are believed to be correct but data variations due to varying processing or ambient conditions can not be excluded. The customer remains responsible for making his own interpretation of data and suitability of the chemicals to his particular operation.
Handling and Storage
DmcWood1841 should be protected from moisture by keeping containers sealed when not in use. Drums have to be stored indoors to protect the material from water ingress, frost and direct heat from the sun. Under temperature conditions and in properly sealed containers ,the storage life of the polyol is 6 months.
The optimum storage temperature should be 10-30℃.
