Complaint
Rigid PU water blown PU Polyurethane Foam System for solar water heaters
1.General description
System LY-2132GH is a fully blended rigid polyurethane foam system which is consist of polyol blend and isocyanate.Polyol blend is the mixture of polyol, blowing agent,silicone surfactant,water,catalyst and additives.This system is designed for the production of CFC free blwon rigid foam insulation usded for solar water heater or electric water heater.
2.Product feature:
a.High volume output efficience
b.quick demould
c.fine dimensional stability
d.excellent thermal insulation
e.good flowability and uniform
f.Freon free and pro-environment
g.suitable for all kinds of material injecting way
3.Product Property
3.1Technical property
| Product Item | LY-2132GH | |||
| Manual | Machine | |||
| Blowing agent | type | All water | ||
| Mixting ratio | (pol/iso) | |||
| Cream time | Sec. | / | / | |
| Gel time | Sec. | / | / | |
| Track free time | Sec. | / | / | |
| Free rise density | Kg/m3 | 32~34 | 32~34 | |
| Moulded density | Kg/m3 | / | / | |
| GB/T 26709-2011 Rigid polyurethane foam for soloar water heaters | ||||||
| Items | Unit | all-water-blown | other blowing agent | |||
| Thermal conductivity average temperature 23ºC | ||||||
| 7 days after manufactured | ≤ | W/m.k | 0.026 | 0.023 | ||
| 28 days after manufactured | ≤ | W/m.k | 0.03 | 0.028 | ||
| compressive strength 10% deformation: | ≥ | MPa | 150 | 130 | ||
| Dimensional stability (100±3)ºC, 48h (-30±3)ºC, 24h | ||||||
| ≤ | % | 1.5 | ||||
| ≤ | % | 1 | ||||
| apperent core density | kg/m3 | 32~45 | 30~40 | |||
| closed cell rate: | ≥ | % | 90 | |||
| water absorption: | ≤ | % | 5 | |||
| Moisture vapour transmission | ||||||
| 38ºC, RH0~88% | ≤ | ng/Pa.m.s | 6.5 or by negotiation | |||
The materials are sensitive to humidity and partially used drums should be tightly sealed to prevent the ingress of moisture.
(Polyol Blend)
The Polyol blend has a shelf life of three to six months from date of manufacture when stored indoors at temperatures of 20-30°C. The Polyol blend is recommended thoroughly mixed before using.
(Isocyanate)
The Isocyanate has a shelf life of one year from date of manufacture when stored indoors at temperatures of 20-30°C. Avoid storage temperatures of below 0°C (as some crystallization may occur) or above 50°C (as formation of insoluble solids may occur).
