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US 4,436,780 AGranted
Nonwoven wiper laminate
AssigneeKimberly-Clark Corporation
InventorsHarry W. Hotchkiss, Patrick J. Notheis, Stephen M. Englebert
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AssigneeKimberly-Clark Corporation
InventorsHarry W. Hotchkiss, Patrick J. Notheis, Stephen M. Englebert
Estimating the term…
Nonwoven wiper having improved absorbency characteristics and streak free wiping properties having a laminate construction including a relatively high basis weight middle layer of meltblown thermoplastic microfibers and, on either side, a lightweight layer of generally continuous filament thermoplastic fibers having a larger average diameter. These wipers are strong, fabric-like, and are useful for a wide variety of applications including industrial uses, food services, as well as many others. The continuous filament layers provide strength and low lint properties while the combination exhibits improved wiping characteristics. The laminate is preferably bonded by application of heat and pressure and the individual components are preferably treated with a surfactant. The preferred combination of a layer of meltblown polypropylene microfibers having on either side a spunbonded polypropylene filament layer is particularly effective as an all purpose wiper.
Wiper comprising a laminate including a relatively high basis weight web having a basis weight in the range of from about 17 to 170 g/m.sup.2 comprising meltblown thermoplastic microfibers having an average diameter in the range of up to about 10 microns and treated with a surfactant and, on both sides of said meltblown web, a relatively low basis weight web having a basis weight in the range of from about 7 to 34 g/m.sup.2 comprising generally continuous thermoplastic filaments having an average diameter in excess of about 10 microns wherein the proportion of the microfiber web to the combined outer webs is at least about 2 to 1 by weight.
Dependencies are inferred from the claim text.