Fluid absorbing article utilizing a flow control cover sheet
AssigneeHercules Incorporated
InventorsRichmond R. Cohen, Edward J. Engle
Life of this patent
Estimating the term…
Abstract
A nonwoven fabric having flow control properties suitable for use in a fluid absorbing article such as a diaper, incontinence pad, or the like; and a process for preparation thereof by utilizing unbonded carded staple fiber elements or webs having different average dpf values compiled in graduated order from high-to-low average dpf, then compressed and bonded to a desired constant fabric density.
Claims52
A fluid-absorbing article comprising, in combination, a nonwoven coverstock component having fluid flow-controlling properties, a fluid-retaining core component, and a fluid impervious backing component, the core component being located between the coverstock and the backing components, the coverstock component having a generally constant density in a range of 0.2 g/cc to 0.02 g/cc and comprising an oriented nonwoven material comprised of at least two layers, each of the layers being layered in a predetermined sequence, compressed together and bonded together, the layers comprising:
- (a) a first exterior layer having a first average denier per filament value, the first exterior layer being comprised of at least one filament;
- and
- (b) a second interior layer adjacent the first exterior layer and having a second average denier per filament value lower than the first average denier per filament value, the second interior layer being comprised of at least one filament.
A coverstock component having a generally constant density in a range of 0.2 g/cc to 0.02 g/cc and comprising an oriented nonwoven material comprised of at least two layers, each of the layers being layered in a predetermined sequence, compressed together and bonded together, the layers comprising:
- (a) a first exterior layer having a first average denier per filament value, the first exterior layer being comprised of at least one filament;
- and
- (b) a second interior layer adjacent the first exterior layer and having a second average denier per filament value lower than the first average denier per filament value, the second interior layer being comprised of at least one filament.
A fluid-absorbing article comprising, in combination, a nonwoven coverstock component having fluid flow-controlling properties, a fluid-retaining core component, and a fluid impervious backing component, the core component being located between the coverstock and the backing components, the coverstock component having a density in a range of 0.2 g/cc to 0.02 g/cc and comprising an oriented nonwoven material comprised of at least two layers having a generally constant density, each of the layers being layered in a predetermined sequence, compressed together and bonded together, the layers comprising:
- (a) a first exterior layer having a first average denier per filament value, the first exterior layer being comprised of at least one carded staple fiber or filament;
- and
- (b) a second interior layer adjacent the first exterior layer and having a second average denier per filament value lower than the first average denier per filament value, the second interior layer being comprised of at least one carded staple fiber or filament.
A nonwoven coverstock material having a density in the range of approximately 0.2 g/cc to 0.02 g/cc and exhibiting fluid-flow controlling properties, comprised of at least two respective layers having a generally constant density, each of the layers being layered in a predetermined sequence, compressed together and bonded together, the layers comprising:
- (a) a first layer having a first average denier per filament value, the first exterior layer being comprised of at least one carded staple fiber or filament;
- and
- (b) a second layer adjacent the first exterior layer and having a second average denier per filament value lower than the first average denier per filament value, the second interior layer being comprised of at least one carded staple fiber or filament.
Dependencies are inferred from the claim text.