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AssigneeInvista North America S.A.R.L.
InventorsDimitri P. Zafiroglu, Geoffrey D. Hietpas, Debora Flanagan Massouda, Thomas Michael Ford
Estimating the term…
A method for preparing stretchable bonded nonwoven fabrics which involves forming a substantially nonbonded nonwoven web of multiple-component continuous filaments or staple fibers which are capable of developing three-dimensional spiral crimp, activating the spiral crimp by heating substantially nonbonded web under free shrinkage conditions during which the nonwoven remains substantially nonbonded, followed by bonding the crimped nonwoven web using an array of discrete mechanical, chemical, or thermal bonds. Nonwoven fabrics prepared according to the method of the current invention have an improved combination of stretch-recovery properties, textile hand and drape compared to multiple-component nonwoven fabrics known in the art.
A nonwoven fabric comprising multiple-component fibers with three-dimensional spiral crimp after heating having no greater than about 5% permanent set wherein when bonded after heating the highest level of stretch of the fabric is at least 12% and wherein the bonds are spaced at about 4 to 8 bonds per cm and have a density of about 16 to 62 per cm2;
A nonwoven fabric comprising multiple-component fibers with three-dimensional spiral crimp after heating having no greater than about 5% permanent set wherein when bonded after heating the highest level of stretch of the fabric is at least 12% and wherein the bonds are spaced at about 4 to 8 bonds per cm and have a density of about 16 to 62 per cm2;
Dependencies are inferred from the claim text.