Polyurethane Rigid Foam Spray Material For Wall Insulation Foam

Update::2022-08-04 15:22 View:
It is a fully formulated polyol blend developed for spray application of PU rigid foam. The component ratio has been adjusted to make it suitable for use with polyurethane foam spraying machines with a fixed volumetric component ratio of 1-1.2:1. It already contains sufficient quantity of blowing agent HCFC 141b to achieve the foreseen foam density.
When the polyol and isocyanate (MDI) are mixed together using suitable foam spray equipment, the resulting foam has a homogenous density. Foams which are allowed to cure for a sufficient time between the layers applied have good skin formation and show good adhesion to the sprayed surface. Special care must be taken the sprayed surfaces are not cold or wet. It is mainly used for the insulation of wall & roof & cold room & container.

Item Standard(25)
Cream time (s) 3-5
Gel time (s) 8-12
Tack free time (s) 10-15
Free rise density (kg/m3) 21-35
Molding density (kg/m3) 38-45

Advantages of Rigid Foam Polyurethane Spraying Process

1. Anti-cracking, no falling off, high bond strength
The polyurethane sprayed on site is 100% bonded, without seams, combined with the base layer as a whole, and can be fully adhered to the base layer of various materials. The extruded board and polystyrene board are 40% point-bonded. Theoretically, the bonding strength of on-site spraying is much greater than that of extruded plastic board and polystyrene board. There is no cavity, and it is not easy to form a hollow, which can effectively prevent the insulation layer from falling off.
2. Strong fire resistance After adding flame retardants, rigid foam polyurethane has two major characteristics: carbonization when burning and self-extinguishing from open fire. The material is flame-retardant, and after carbonization, it can isolate the air from entering and leaving, which can effectively prevent the spread of fire. Flame retardant is the key to the fire performance of rigid foam polyurethane.
3.  Node handling is easy
The on-site spraying is flexible, not restricted by the area, and can be sprayed directly at the required construction nodes.
4. The hot and cold bridges are seamlessly combined, and the cold and hot bridges are not easy to appear, and the thermal conductivity of the material itself is also very low, which is energy-saving and environmentally friendly.
5. Light load and thin thickness. Under the same thermal insulation effect, polyurethane with a thickness of 5 cm is equivalent to a polystyrene board with a thickness of 6.5 cm, or an extruded board with a thickness of 8 cm, and rock wool with a thickness of 10-15 cm. . In contrast, the wall bearing capacity of sprayed rigid foam polyurethane material is lighter and safer.
6. Good waterproof performance. The on-site sprayed polyurethane is integrally sprayed, without cavities and joints. The closed cell rate itself is as high as 90%, and the waterproof performance is excellent.
7. Good water repellency and strong air permeability Polyurethane material has air permeability and low water absorption rate, which can better block the penetration of water and water vapor, and has good water repellency, which can effectively avoid condensation inside the wall during the migration of water vapor. .
8. The construction speed is fast and the construction range is more flexible. Compared with other thermal insulation materials, the aging time of polyurethane is the shortest, and the construction can be carried out one day after the spraying is completed.