- Author
-
Fourt, L.
- Title
- Study of Ignition and Exposure. 3rd Quarterly Report.
- Coporate
- Gillette Research Inc., Washington, DC
- Report
-
3rd Quarterly Report,
September 30, 1971,
37 p.
- Keywords
-
ignition
|
flammable fabrics
|
exposure
|
stoves
|
ignition time
|
cellulose
|
wool fabrics
|
moisture
|
flame temperature
- Identifiers
- effect of height above stove; twenty-specimen ignition tests on all committee fabrics; effect of absorbed moisture in cotton on ignition time; probability of ignition, and time of expsoure for different fabrics
- Abstract
- Two principal experimental tasks have been the main work of this quarter. One has been the further study of the relation between height above the stove and time, or probability of ignition. This has shown that the chief difference is at the point of passing through the top of the flame. When the specimen is immersed in flame there is a small dependence on position within the flame, but all of the times for cellulose containing fabrics are relatively short even though statistically significant differences with height can be observed. At the top of the flame and above, the times for ignition become much longer and much more variable. The other chief task ahs been the measurement of the effect of exposure at an initial height of one inch above the flame (which is well within the flame) on the melt-shrink group of fabrics containing man-made fibers. These fabrics were tested in sets of 20 specimens as with the other types of fabrics. Some specimens out of each group of 20 did burn, but many shrank away from the flame without igniting. On the specimens which shrank, measurements of the change by shrinkage were made. All specimens were sewn with one line of cotton sewing thread. In a test of a nylon fabric sewn with a nylon thread, none of the specimens ignited, all shrank away from the flame. Preliminary tests of the effect of relative humidity or of water content of cotton fabrics on the flammability have shown that within a wide range around the usual room conditions of these tests, there is no significant effect.