Saran was tested for flammability as a wrapping on TFE-insulated electrical wire bundles in oxygen gas at pressures of 7.5 psia and 14.7 psia. It was found to be fire retardant or self-extinguishing in most instances

Goodwin, J. T.

Herrera, W. R.

English

NASA Technical Reports Server

June 1968	 Brief 68-10177 
fl	
NASA TECH BRIEF H 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Saran Film Is Fire-Retardant in Oxygen Atmosphere 
.
Saran, a commercially available polyvinylidene 
chloride copolymer, which forms heat shrinkable 
films that do not support combustion in air (2.9 psia 
oxygen partial pressure), was tested for flammability 
as a wrapping on electrical wire bundles in oxygen 
gas at pressures of 7.5 psia and 14.7 psia (I atmos-
phere). 
Several tests in the oxygen atmospheres were made 
on specimens of saran heat shrinkable sleeving on 
TFE-insulated electric wire. At 14.7 psia oxygen, 
the saran on test specimens in a horizontal position 
extinguished fires started in the TFE coating; the saran 
on specimens in a vertical position was consumed. In 
runs in which TFE-coated wire was overheated by 
electric current, saran sleeving reduced the rate at 
which the TFE insulation was consumed. The saran
wrapping was self-extinguishing in fires in 7.5 psia 
oxygen except when polyethylene heat shrinkable 
sleeving was also used. 
Note: 
Complete details may be obtained from: 
Technology Utilization Officer 
Manned Spacecraft Center 
Houston, Texas 77058 
Reference: B68-10177 
Patent status: 
No patent action is contemplated by NASA. 
Source: J. T. Goodwin and W. R. Herrera 
of Southwest Research Institute 
under contract to 
Manned Spacecraft Center 
(M SC- l 1604) 
Category 03 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19680000177 2020-03-12T05:31:23+00:00Z


Saran film is fire-retardant in oxygen atmosphere

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