Non-woven fabric comprising at least one spunbonded layer
AssigneeKimberly-Clark Corporation
InventorsPeter Maddern, Kenneth J. G. Currie
Life of this patent
Estimating the term…
Abstract
Nonwoven material comprising a web of spunbonded polymer filaments in combination with at least one other spunbond or meltblown nonwoven layer with the combination impregnated with a stabilizing agent and the spunbond layer having been hot calendered to improve surface abrasion resistance. Preferred embodiments using a coating bath also including a surfactant and smooth calendering.
Claims11
A laminate comprising a layer of spunbonded polymeric nonwoven filaments and a layer of meltblown polymeric fibers, the laminate having been treated with a thermal stabilizing agent forming an exterior fiber casing on at least one of said filaments and fibers, thermally pattern bonded and subsequently to the pattern bonding of the laminate, calendered by passing through a nip between two rolls including a smooth, hot roll resulting in increased surface abrasion resistance of an average weight loss per thousand rubs of 10.5 milligrams or less while retaining an open fiber structure providing an average air permeability of at least 11 dm/min per 20 cm.sup.2 measured by DIN Std 53 887.
A process for making a nonwoven laminate material comprising the steps of,
- a) providing a layer of spunbonded polymeric nonwoven filaments and at least one other layer selected from nonwoven polymeric spunbonded filaments and nonwoven polymeric meltblown fibers,
- b) impregnating at least one of said layers with a thermal stabilizing agent forming an exterior fiber casing on at least one of said filaments and fibers,
- c) combining at least two of said layers by thermal pattern bonding, and
- d) passing said combined layers through a nip between two rolls including a smooth heated roll, thereby hot calendering at least one spunbonded layer of said combination of layers.
Dependencies are inferred from the claim text.