High loft spunbonded web
Assignee3M Innovative Properties Company
InventorsAndrew R. Fox, John D. Stelter, Michael R. Berrigan, Jonathan M Lise
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Abstract
Herein are disclosed high loft spunbonded webs that are substantially free of crimped fibers and gap-formed fibers. The webs exhibit a solidity of from less than 8.0% to about 4.0% and a ratio of Effective Fiber Diameter to Actual Fiber Diameter of at least 1.40. Also disclosed are methods of making such webs.
Claims21
A spunbonded web comprising a solidity of from less than 8.0% to about 4.0% and comprising a ratio of Effective Fiber Diameter to Actual Fiber Diameter of at least 1.40, wherein the web is comprised of meltspun fibers that are substantially free of crimped fibers, gap-formed fibers, and bicomponent fibers.
A pleated filter for a forced air ventilation system, comprising filter media comprising a plurality of oppositely-facing pleats and further comprising a rectangular perimeter frame that is present along the edges of the filter media and that comprises a U-shaped cross-section, wherein the filter media comprises a spunbonded web comprising a solidity of from less than 8.0% to about 4.0% and comprising a ratio of Effective Fiber Diameter to Actual Fiber Diameter of at least 1.40, wherein the web is comprised of meltspun fibers that are substantially free of crimped fibers, gap-formed fibers, and bicomponent fibers.
Dependencies are inferred from the claim text.