- Author
-
Sylvain, R. B.
- Title
- Development of an Anti-Sweat Fire Resistant Foam for Sub Hull Insulation. Final Report. September 17-July 16, 1983.
- Coporate
- Fiber Materials, Inc., Biddeford, ME
- Sponsor
- Naval Research Lab., Washington, DC
- Report
-
N00014-82-C-2390
July 16, 1983
72 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
insulation
|
ships
|
hull insulation
- Abstract
- Attempts were made to flexibilize the patented FMI FTR* fire retardant foam. This technical objective was approached by attempting to chemically alter the polymeric structure as well as alloying the polymer with non-reactive, potentially flexibiliing additives. All attempts were unsuccessful. The high open cell content could not be decreased significantly, even with increased foam density. It had been anticipated that with increased flexibility, the foam membranes would not break from internal pressures, low elasticity and the shrinkage stresses due to polymerization. However, because flexibility could not be achieved, the compression set, water absorption and water vapor transmission (WVT) specification values were not attained. The FMI patented FTR was applied to both principle faces of 2.54 cm. thick foam slices (boards) from the foam buns. This resin strengthened the foam web, thereby decreasing the friability and greatly improving the handling characteristics. An FMI FTR coating was used as a potential sealer on the surface facing the inside of a submarine. The intent of the coating was to increase the compression resistance and decrease both WVT and water absorption. This improved these properties as compared to the uncoated foam. Scale-up to 1 foot by 2 feet and 1 foot by 3 feet buns was achieved using the standard FMI FTR foam formulation except for a slight modification to offset the mass effect.