Strength improved single polymer conjugate fiber webs
AssigneeKimberly-Clark Worldwide, Inc.
InventorMary Lou DeLucia
Life of this patent
Estimating the term…
Abstract
The present invention provides a high strength autogenously bonded nonwoven fabric containing single polymer conjugate fibers which have at least two substantially the same component compositions, wherein the component compositions of the fibers contain one thermoplastic polymer selected from the group consisting of semicrystalline thermoplastic polymers, crystalline thermoplastic polymers and blends thereof. The component compositions are processed with substantially identical processing conditions to form the fibers and have substantially the same melt flow rate as measured in accordance with the ASTM 1238-65T testing procedure.
Claims16
A high strength autogenously bonded nonwoven fabric comprising single polymer conjugate fibers having at least two components compositions, said conjugate fibers having a sheath-core configuration, all of said component compositions consisting essentially of one thermoplastic polymer selected from the group consisting of semicrystalline thermoplastic polymers, crystalline thermoplastic polymers and blends thereof, wherein said component compositions are processed with an identical processing condition or substantially identical processing conditions to form said fibers such that the at least two component compositions have a melt flow rate differences of equal to or less than about 10 g/10 minute.
A high strength autogenously bonded nonwoven fabric comprising single polymer conjugate fibers having at least two component compositions, said conjugate fibers having a sheath-core configuration, each of said component compositions consisting essentially of the same thermoplastic polymer selected from the group consisting of semicrystalline thermoplastic polymers, crystalline thermoplastic polymers and blends thereof, and each of said component compositions having been subjected to a process consisting essentially of the same processing conditions to form said conjugate fibers, wherein the processed component compositions forming the conjugate fibers have a melt flow rate difference of equal to or less than about 5 g/10 min, as measured in accordance with the ASTM 1238-65T testing procedure.
Dependencies are inferred from the claim text.