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Endotoxin Reduction in Dust from Heated Cotton Fibers

USDA, ARS, Southern Regional Research Center, New Qrleans, Louisiana 70179, U.S.A.

David T.W. Chun

USDA, ARS, Cotton Quality Research Station, Clemson, South Carolina 29634, U.S.A.

Cotton was heated in a gas-fired pilot plant dryer at temperatures previously shown to reduce endotoxin levels in fiber. Heating at 255°C for 20 seconds reduced the endotoxin content of dust collected from the fibers by 90% as measured by the Limulus amebocyte lysate assay. However, heat detoxification at 255°C had a detrimental effect on fiber physical properties as evaluated by high volume instrument testing, with a 24% reduction in fiber strength, a 6% reduction in length, and a 7% reduction in uniformity index. Dust release from cotton heated at 255°C was three times that from unheated cotton.

Textile Research Journal, Vol. 65, No. 9, 501-504 (1995)
DOI: 10.1177/004051759506500902


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