Rigid polyurethane foam is recognized in the market as the material that provides an optimal insulation in multiple applications.
Its versatility in the manufacturing process can be adapted to the surfaces in a unique way, providing the performance required in each case.
The case of thermal tanks
As an example of application of polyurethane in the field of filling large cavities, we would like to expose the case of vertical thermal tanks that are used for the storage of food, such as milk, whey and other products.
In this case, these are watertight tanks covered by stainless steel plates polished in origin.
The inner tank is made with seams and edges of health construction.
The bottom is flat and inclined with a big slope to facilitate the emptying process.
Furthermore, these tanks have an access ladder on the top with safety protection and a gateway with an anti-slip sheet and railings.
Elements to contain the level detectors, which detect the average minimum level for the starting of the removers and the maximum of security.
As auxiliary elements, such deposits have a chemical cleaning water canon and an inspection opening at the bottom with a hinged cover.
There are two possibilities of support, over five stainless steel legs or prepared to be directly fixed on a concrete base.
Solution for thermal tanks by Synthesia Internacional
In these cases, with double-tight enclosure system, the polyurethane insulation casting 9762-N, a rigid low-density foam, is the ideal product for the filling of large cavities, and it provides the required insulating features, consistent with the aesthetics and the capacity of the tank or reservoir.
Polyurethane system for insulation casting 9762-N Factsheet
The 9776-N is a system of rigid polyurethane foam insulation by casting, CFCs and HCFCs free.
The system components are the ones normally used in polyurethane systems with thermal insulation function:
- Component A or Polyol 9762-N, composed of a mixture of polyols, catalysts, flame retardants and foaming agents (with HFCs).
- Component B or isocyanate , more detailed PMDI - Diphenyl methane diisocyanate-
The system is suitable for the production of rigid foams with an applied density of 40-50 kg/m3, especially recommended for the filling or isolation of all kinds of cavities such as tanks, reservoirs, cooling chambers, boat chambers, etc.
The system can be prepared both in high pressure (100-150 bar) and low pressure machines.
The recommended temperature for components is 20-22 °C.
The proper temperature of the molds to prevent further densification and to avoid the decrease of the adhesion of the foam on the substrate is from 40 to 50 °C.
Loaded into the tank of the machine, at low or high pressure with stirring, the polyol should be kept under pressure. (We recommend nitrogen, 0.5-1 bar and 2 bar respectively).
If it is not explicitly stated, we recommend you not to shake the drums prior to their loading, in order to avoid the loss of the foaming agent.
- Components A and B are sensitive to humidity and should be stored in airtight containers or tanks.
- The storage temperature must be between +15 and +25 ºC.
- Lower temperatures that can cause crystallization in the isocyanate must be avoided, as well as elevated temperatures that can produce alterations in the polyol.
- With adequate storage, the validity periods are 6 months for component A (polyol) and 9 months for component B (isocyanate).
- The system does not present significant risks with proper management. Avoid contact with eyes and skin.
- During the elaboration and manipulation of the system, the "Safety Data Sheets" of the products must be taken into account.
Form of supply
The material is normally supplied in 220 liter non-returnable metal drums (blue for component A and black for component B).
For further specifications such as the characteristics of the components, specifications or characteristics of the foam systems, download the factsheet.