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AssigneeThe Procter & Gamble Company
InventorsHugh A. Thompson, Edward H. Krautter
Estimating the term…
Capillary channel structures having one or more intrastructure capillary channels, said structures comprising a polymer composition, wherein: said structures have a capillary channel base, and at least two polymeric capillary channel walls extending from said base along the length of said base in the axial direction for at least about 0.2 cm, said walls having a base end and a distal end, wherein said base and walls form said capillary channels; and said structures have a Specific Capillary Volume of at least about 1.2 cc/g, a Specific Capillary Surface Area of at least about 500 cm.sup.2 /g, and a Compressive Strength (Dry) of at least about 13,800 dynes/cm.sup.2. The structures can be in the form of fibers or sheets. The fibers have a Specific Capillary Volume of at least about 2.0 cc/g and a Specific Capillary Surface Area of at least about 2000 cm.sup.2 /g. An improved process, and extrusion dies for use therein, wherein the extrusion die has an annular orifice with wall orifices extending radially therefrom, are also provided.
Capillary channel polymeric structures having collapse resistance having one or more intrastructure capillary channels formed by a capillary channel base, and at least two capillary channel polymeric walls, each wall having a base end and a distal end and each wall extending from said base along the length of said base in the axial direction parallel to said base for at least about 0.2 cm, said structures further having a Specific Capillary Volume of at least about 2.0 cc/g, a Specific Capillary Surface Area of at least about 2000 cm.sup.2 /g, and a Compressive Strength (Dry) of at least about 13,800 dynes/cm.sup.2.
Capillary channel polymeric structures having collapse resistance having one or more intrastructure capillary channels formed by a capillary channel base and at least two capillary channel polymeric walls, each wall having a base end and a distal end and each wall extending from said base along the length of said base in the axial direction parallel to said base for at least about 0.2 cm, said structures having a Slenderness Ratio of at least about 9, at least 30% of the capillary channels in said structures having a capillary channel width of less than about 0.30 mm, and having a Compressive Strength (Dry) of at least about 13,800 dynes/cm.sup.2.
A capillary channel polymeric sheet having collapse resistance having a plurality of intrastructure capillary channels formed by a planar capillary channel base and a plurality of polymeric walls, each wall having a base end and a distal end and each wall extending from said base along the length of said base in the axial direction parallel to said base for at least about 0.2 cm, said sheet having a Specific Capillary Volume of at least about 1.2 cc/g, a Specific Capillary Surface Area of at least about 500 cm.sup.2 /g, and a Compressive Strength (Dry) of at least about 13,800 dynes/cm.sup.2 ;
A capillary channel polymeric sheet having collapse resistance having a plurality of intrastructure capillary channels formed by a planar capillary channel base and a plurality of polymeric capillary channel walls, each wall having a base end and a distal end and each wall extending from said base along the length of said base in the axial direction parallel to said base for at least about 0.2 cm, said sheet having a Slenderness Ratio of at least about 9, at least 30% of the capillary channels in said sheet having a capillary channel width of less than about 0.30 mm, said sheet having a Compressive Strength (Dry) of at least about 13,800 dynes/cm.sup.2 ;
Dependencies are inferred from the claim text.