Process for making nonwoven fabric
AssigneeE. I. Du Pont de Nemours and Company
InventorsRashmikant Maganlal Contractor, Birol Kirayoglu
Life of this patent
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Abstract
The tensile strength of nonwoven fabric made by traversing a fibrous web on an apertured support with fine columnar streams of liquid is increased when the fine columnar streams are divided up into an array of a plurality of rows of streams, instead of a single row, with the streams in each row being staggered from one another and the rows being spaced 10 to 80 mils apart.
Claims9
In the process of impinging a row of fine columnar streams of liquid onto a fibrous web of staple fibers supported on an apertured support passing therebeneath to produce by fiber entanglement a patterned nonwoven fabric, the improvement comprising impinging said streams onto said web as an array of streams in a plurality of rows in which the streams are staggered from row to row, said streams being spaced apart sufficiently to provide an increase in tensile strength of said fabric and space close enough together to avoid substantially changing the pattern in the fabric, both as compared to when all said streams are in a single row, the spacing between said rows being from 0.254 to 2.032 mm.
Dependencies are inferred from the claim text.