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.
Claims13
A nonwoven material comprising:
- a plurality of randomly oriented and bulked crimped filaments, each filament ranging from 1-15 dpf, a plurality of point bonds interconnecting said crimped filaments into a fixed 3-dimensional structure, and a surface portion of said fixed 3-dimensional structure having a greater density than an inner portion of said 3-dimensional structure, wherein a ratio of surface portion density to inner portion density being in a range of 10-110:1.
A nonwoven material comprising:
- a plurality of randomly oriented and bulked crimped filaments, each filament ranging from 1-15 dpf, a plurality of point bonds interconnecting said crimped filaments into a fixed 3-dimensional structure, a surface portion of said fixed 3-dimensional structure having a greater density than an inner portion of said 3-dimensional structure, and an external surface of said fixed 3-dimensional structure being substantially free of any protruding filaments, wherein a ratio of surface portion density to inner portion density being in a range of 10-110:1.
A nonwoven material comprising:
- a plurality of randomly oriented and bulked crimped filaments, each filament ranging from 1-15 dpf, a plurality of point bonds interconnecting said crimped filaments into a fixed 3-dimensional structure, and a surface portion of said fixed 3-dimensional structure having a greater density than an inner portion of said 3-dimensional structure, wherein a ratio of surface portion density to inner portion density being in a range of 10-110:1 and the nonwoven material excluding nonwoven fabrics made by dry, wet, or air laying processes, needle-punching, spunbond or meltblown processes, and hydroentangling.
Dependencies are inferred from the claim text.