Nonwoven from bulked filament tow
AssigneeCelanese Acetate LLC
InventorsRaymond M. Robertson, Rene B. Neron, Gary E. DeHart
Life of this patent
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Abstract
A nonwoven material has a plurality of randomly oriented and bulked crimped filaments, a plurality of point bonds interconnecting said crimped filaments into a fixed, 3-dimensional structure, and either a surface portion of said fixed, 3-dimensional structure having a greater density than an inner portion of said 3-dimensional structure or an external surface of said fixed, 3-dimensional structure being substantially free of any protruding filaments. The nonwoven material is made by: bulking a filament tow, fixing the bulked tow into a 3-dimensional structure, and calendering the 3-dimensional structure.
Claims6
A method of making a nonwoven material having a plurality of randomly oriented and bulked crimped filaments, a plurality of point bonds interconnecting said crimped filaments into a fixed, 3-dimensional structure, and either a surface portion of said fixed, 3-dimensional structure having a greater density than an inner portion of said 3-dimensional structure or an external surface of said fixed 3-dimensional structure being substantially free of any protruding filaments, comprising the steps of:
- bulking a filament tow,
- fixing the filaments into the 3-dimensional structure, and
- calendering the 3-dimensional structure by overfeeding the bulked filament tow into a calender.
Dependencies are inferred from the claim text.