Self-bonded fibrous nonwoven webs having improved softness
AssigneeAmoco Corporation
InventorsPaul N. Antonacci, Delores R. Morris, Peter W. Pascavage, Steven M. Pruitt
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Abstract
A uniform basis weight self-bonded, fibrous nonwoven web having improved antistatic, softness and retention of water resistance in the presence of antistatic agents and composites comprising the nonwoven web useful for applications in the hygiene, healthcare, agriculture and other markets.
Claims7
A uniform basis weight self-bonded, fibrous nonwoven web having improved antistatic properties comprising a plurality of substantially randomly disposed, substantially continuous polymeric filaments comprising a polyolefin resin having incorporated therein an antistatic agent in an amount effective to provide a web having surface resistivity of about 1.0.times.10.sup.13 ohms/square or less without substantial adverse surface effect on the web, said web having a Basis Weight Uniformity Index of 1.0.+-.0.05 determined from average basis weights having standard deviations of less than 10% wherein said Basis Weight Uniformity Index is defined as a ratio of an average basis weight determined on a unit area of 1 in.sup.2 sample of web to an average basis weight determined on an area of web 12 to 18 times as large as the unit area.
A uniform basis weight self-bonded, fibrous nonwoven web having improved softness and antistatic properties comprising a plurality of substantially randomly disposed, substantially continuous polymeric filaments comprising a polyolefin resin selected from the group consisting of polypropylene, ethylene-propylene random copolymer, high density polyethylene, low density polyethylene, linear low density polyethylene, a blend of polypropylene and polybutene, and a blend of polypropylene and linear low density polyethylene, said polyolefin resin having incorporated therein about 0.05 to about 1.0 wt. % glycerol monostearate such that said web has a surface resistivity of about 1.0.times.10.sup.13 ohms/square or less wherein said web has a Basis Weight Uniformity Index of 1.0.+-.0.05 determined from average basis weights having standard deviations of less than 10% wherein said Basis Weight Uniformity Index is defined as a ratio of an average basis weight determined on a unit area of 1 in.sup.2 sample of web to an average basis weight determined on an area of web 12 to 18 times as large as the unit area.
Dependencies are inferred from the claim text.