University of Tennessee Research Foundation

Other

The United States of America As Represented by the Secretary of

Charles B Hassenboehler

Larry C Wadsworth

Larry B Wadsworth

Craig L Folk

James I Kotter

Peter Ping-Yi Tsai

Gretta Heismeyer

This invention is directed towards a porous composite having an inlet face and an exit face and further comprises intermingled meltblown fibers and staple fibers which define a density gradient from coarse pores at the inlet face to fine pores at the exit face.

Meltblown composites and uses thereof

The present invention relates to a planar consolidated multilayered nonwoven web comprising reduced pore sizes. The present invention also relates to a method for forming a planar consolidated multilayered nonwoven web which is elastic in the cross direction and which comprises a first and a second layer.

Post-treatment and consolidation of laminated nowwoven fiber webs

Nonwoven webs consolidated and elastic transverse direction, laminates and methods of making same are disclosed.

Post-treatment of laminated nonwoven cellulosic fiber webs

A method for post-treating a precursor nonwoven web including consolidating the web laterally, thereby reducing the maximum pore size measure of the web and improving the filtration efficiency of the web, and subjecting the consolidated web to an electrostatic field to further enhance filtration efficiency.

Post-treatment of non-woven webs

A method for post-treating a laminated precursor nonwoven web which includes layers of thermoplastic man-made fibers and at least one layer of cellulose-based staple natural fibers, including consolidating the web laterally and thereby reducing the maximum pore size measure of the web. The precursor web and the resultant consolidated nonwoven web are also disclosed, as is utilization of the product web in medical uses.

A meltblown pleated web suitable for manufacturing cigarette filters or filter rods is prepared by drawing a meltblown web having longitudinal bend lines under thermal conditions to impart micropleats along the bend lines. Preferably the drawn and heated and pleated web is passed through an electric field to impart an electrostatic charge to its fibers.

Cigarette filter micropleated web and method of manufacture

A consolidated non-woven web made by post-treating a precursor nonwoven web including consolidating the web laterally by drawing, thereby reducing the maximum pore size measure of the web and improving the filtration efficiency of the web, and subjecting the consolidated web to an electrostatic field to further enhance filtration efficiency.

Electrically charged, consolidated non-woven webs

A method for post-treating a laminated precursor nonwoven web which includes layers of thermoplastic man-made fibers and at least one layer of cellulose-based staple natural fibers, including consolidating the web longitudinally and thereby reducing the maximum pore size measure of the web. The precursor web and the resultant consolidated nonwoven web are also disclosed, as is utilization of the product web in medical uses.

A method for post-treating a precursor nonwoven web including consolidating the web laterally and thereby reducing the maximum pore size measure of the web. The resultant nonwoven web is also disclosed as is utilization of the product web as a filter.

Post-treatment of nonwoven webs

A filter useful as a cigarette smoke filter is made by convergingly passing a flat restrained meltblown web successively through a heated zone and a trumpet to form a roving. The roving may be processed to make filters. The process results in stretch orientation of longitudinal fibers and bulking due to cross fibers. Primary and secondary pleats formed in the web are bundled into a cylindrical roving. The pleats add bulking to the web and provide fluid permeability through the filter.

Nonwoven filter and method of manufacture

Under influence of positive and negative aerodynamic action imposed on a conic surface, airborne fibers and tufts are compelled to disperse approximately 360.degree. and to enter the rotor of an open-end yarn spinner device, peripherally, thereby minimizing identifiable yarn imperfections and inefficiencies attributive to open-end yarn formation.

Fiber dispersing and feeding apparatus for open end spinning

This invention relates to an apparatus for stretching a textile material such that the magnitude of the strain at all points is equal in all directions in the plane of the specimen. The embodiment disclosed is an expandable circular pin frame. The pins mounted in puley are uniformly displaced radially outward and impart uniform radial strain without the edge effects associated with similar apparatus employing nonexpanding fastening mechanisms.

Growing community of inventors

Knoxville, TN, United States of America

Charles B Hassenboehler