New technology for the production of R11-free expanded polyurethane panels.

Nuove tecnologie per la produzione di pannelli in poliuretano espanso privo di R11.

Summary

Discussed in this article are: qualitative considerations on rigid polyurethane foam. Mathematical model for the calculation of the heat conductivity of rigid foams. Problems of gas diffusion in expanded polyurethane. Advantages of coating. Quality requirements for expanding agents. Substitutes for R11: present substitutes (HCFC-123, HCFC-142b, HCFC-141b, HCFC-22, cyclopentane); future substitutes: latest generation of HFCs. New technology for panel production with R134a: description of the plant: comparison of polyurethane samples, respectively expanded with R11 and R134a (physical and mechanical properties in particular). J.G.

Details

Original title: Nuove tecnologie per la produzione di pannelli in poliuretano espanso privo di R11.
Record ID : 1998-2810
Languages: Italian
Source: FREE '97. Fluidi refrigeranti, espandenti, estinguenti./ FREE '97. Refrigerating, blowing and extinguishing agents.
Publication date: 1997/04/18
Document available for consultation in the library of the IIR headquarters only.

Links

See other articles from the proceedings (12)
See the conference proceedings

Indexing

Themes: HCFCs;
HFCs;
Insulants
Keywords: R134a; Insulant; Commercial application; R22; R142b; R141b; R123; Physical property; Polyurethane; Foam; Insulation