Author
Hinchliffe, Doug | |
DE LUCCA, ANTHONY - RETIRED ARS EMPLOYEE | |
CONDON, BRIAN | |
O'REGAN, JAN - COTTON, INC. | |
CLEMMONS, JULIE - COTTON, INC. | |
Zeng, Linghe | |
BYLER, RICHARD | |
REYNOLDS, MICHAEL | |
ALLEN JR, HIRAM | |
Santiago Cintron, Michael | |
Madison, Crista |
Submitted to: Meeting Abstract
Publication Type: Abstract Only Publication Acceptance Date: 2/14/2013 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Microbial burden measurements are crucial for certain converter uses of nonwoven materials. Currently, the microbial burden of natural fibers such as cotton have not been quantified and little consideration has been given to the potential contamination introduced by synthetic fibers during the processing from synthesis to roll goods production. A total of seven source fiber types were selected for use in the manufacturing of nonwoven roll goods: polyester; polypropylene; rayon; greige cotton from two sources; mechanically cleaned cotton; and scoured and bleached cotton. The bacterial and fungal microbial burden of each source fiber was measured as a preliminary assessment of microbial contamination using heterotrophic pour plate counts. Natural greige cotton fibers exhibited the highest levels of total microbial contamination, which were reduced by both storage time and trash removal in the form of mechanical cleaning. Changes in microbial burden levels were measured at each step in the nonwoven manufacturing process that included opening, carding, needlepunch fabric production; hydroentangled fabric production and recovered effluents, and final hydroentangled roll goods. The hydroentanglement process resulted in the greatest reduction in microbial burden with no detectable levels of aerobic microbial contamination present on any of the final hydroentangled roll goods regardless of the source fiber. No detectable levels of aerobic microbial regrowth were observed on any fabrics regardless of storage time or ambient storage conditions. Analysis of suspended solids (> 5'M) present in hydroentanglment effluents collected during fabric production revealed significantly less suspended solids (p < 0.001) emanated from synthetic fibers compared to all cotton fiber types. Among the cotton fibers utilized, greige and greige mechanically cleaned released significantly less suspended solids than scoured and bleached. |