| Customization: | Available |
|---|---|
| Molecular Principal Chain: | Naphthenic Polymer |
| Color: | Brown |
|
Still deciding? Get samples of US$ 0/kg
Order Sample
|
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment methods: |
|
|---|---|
| Support payment in USD |
| Secure payments: | Every payment you make at Made-in-china.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Rigid Manually operating process PU Polyurethane Foam System for Electric water heater
1.General description
DFR21 is a semi resin premix combined polyol, based on polyether polyol, formulated with catalyst,blowing agent,stabilizing agents and other additves(if necessary) according to a parameter.It is a fully formulated polyether polyol developed for the rigid insulation of solar water heaters.It is the mixture of polyol.
2.Technical Quality Conditions:
2.1 Physical characteristics
Item Unit Index
Appearance light yellow transparent liquid
Viscosity 25ºC,mPa.S 400±50
Hydroxy Value mgKOH/g 380±20
Specific gravity 25ºC 1.1±0.05
2.2 Process and reactive characteristics( actual value varied depends on the processing conditions)
2.3.1 Foaming condition
2.3.1.1 Manual mixing
Component temperature:28-30ºC
2.3.1.3 Recommended processing property
Item Unit Manual Mixing
cream time (S) /
gel time (S) /
tack-free time (S) /
free rise density (kg/M3) /
Note: ratio varied depends on processing system
2.4 Recommended ratio:
| Component | Part by weight |
| Blend polyol | 100 |
| MDI | 100-120 |
| ITEM | PROPERTY | ||
| Apparent core density (kg/m3) ≥ | / | ||
| Initial Thermal conductivity (W/m.k) ≤ | / | ||
| Compressive strength ≥ | / | ||
| Closed-cell rate (%) ≥ | / | ||
| water absorption (V/V) % ≤ | / | ||
| Dimensional stability(%) | Low temperature (-30±3ºC,24hs) |
≤ | / |
| High temperature (100±3ºC,48hs) |
≤ | / | |
| Moisture vapour transmission 38ºC,RHO-88% |
Ng/Pa.m.s | ≤ | / |
3. Main Applications:
rigid PU foam cores for insulation of water heaters in combination with isocyanate (MDI).
){kind=link}