Modulus nonwoven webs based on multi-layer blown microfibers
AssigneeMinnesota Mining and Manufacturing Company
InventorsEugene G. Joseph, Daniel E. Meyer
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Abstract
A high modulus nonwoven web is produced using a high modulus material and a self-bonding material formed as multi-layer melt-blown microfibers where the web modulus is greater the MX.sub.1 +MX.sub.2 where M.sub.1 and M.sub.2 represent the modulus values of webs formed from the two materials and X.sub.1 and X.sub.2 represent the respective volume portions of the materials in the web fibers.
Claims16
A melt-blown nonwoven web comprising melt-blown microfibers having at least two continuous layers throughout said fiber length comprised of at least one first layer of a self-bonding material, at melt-blowing conditions, and at least one second layer of a relatively high modulus material wherein the melt-blown web has a tensile modulus at least 1.5 times greater than a mean web modulus, M.sub.1 X.sub.1 +M.sub.2 X.sub.2, where M.sub.1 and M.sub.2 are the tensile modulus values of corresponding nonwoven webs of the first layer material and second layer material respectively and X.sub.1 and X.sub.2 are the respective volume fractions of the first and second layer materials.
Dependencies are inferred from the claim text.