Jump to navigation Jump to search
Bubblefil is strong


[DuPont] A brand name for a bubble-filled Viscose rayon fiber. Bubblefil was first produced during W.W.II as a substitute for imported Kapok. It is made by injecting air inside the rayon filament during extrusion. The lightweight buoyant fiber was used in life jackets, pontoons, and insulated clothing (Cook 1984).

Bubblefil is lightweight

Synonyms and Related Terms

bubblefill (sp)

Physical and Chemical Properties

Weighs 1.5 pound per cubic foot.

Bubbles remain intact at altitudes above 50,000 feet, and temperature above 200F and below 0F.

It has low thermal conductivity.

Resources and Citations

  • J.Gordon Cook, Handbook of Textile Fibres:II Man-made Fibres, Merrow Publishing Co. , Durham, England