3m Innovative Properties Company

John M Sebastian

Fuming B Li

Nathan E Schultz

Mario Alberto Perez

Robert D Taylor

Thomas P Klun

Kevin Michael Lewandowski

Larry R Krepski

Duane Douglas Fansler

Chetan P Jariwala

Marvin E Jones

Robert Steven Kody

Terry R Hobbs

Caroline M Ylitalo

Andrew R Fox

Michael R Berrigan

Joseph D Rule

Seyed Abolhassan Angadjivand

John M Brandner

Justin L Keough

Diane R Wolk

Philip G Martin

Stefan H Gryska

Daniel A Japuntich

Stephen P Polski

Mary R Boone

Paul A Martinson

Rahul R Shah

John D Stelter

David A Olson

Daniel C Duan

Eric M Moore

Paul D Graham

Timothy J Lindquist

Pierre Legare

Seth M Kirk

Matthew Justin Michel

Christopher K Haas

Feng Bai

Kenneth J Krepel

Anthony F Schultz

Ravi K Sura

Luke T Dressel

Kelly A Volp

John W Longabach

Liming Song

Shih-Hung Chou

Sachin Talwar

Oh Sang Woo

Bong Y Yeom

Paul DeRoussel

Kimberley D Klepzig

Zackary J Becker

Christopher A Hurley

Jeffrey O Ernslander

Julie S Prudich

John M Brander

Rahul B Shah

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted-benzimidazole compound. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Substituted benzimidazole melt additives

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiols. The heterocyclic thiol has 2 nitrogen groups and a third group that may be an NH, N—NH, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Substituted thiol melt additives

A pleated filter element comprising a pleated filter media comprising a plurality of oppositely-facing pleats with a pleat direction and with a plurality of upstream and downstream pleat tips and pleat valleys, wherein the pleated filter media comprises two corrugated edges and two noncorrugated edges. The first (second) corrugated edge of the pleated filter media comprises an edge dam of hardened adhesive that occupies the upstream and downstream pleat valleys at a location laterally inwardly proximate the first (second) corrugated edge and that extends along an entire longitudinal extent of the pleated filter media. The pleated filter media is a multilayer media comprising an organic polymeric nonwoven web, that exhibits a Percent Penetration of less than 5, laminated with a fiberglass prefilter layer that is disposed upstream of the primary filtration layer and that exhibits a Percent Penetration of greater than about 70.

Pleated filter element comprising pleated filter media with edge dams, and method of making and using

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted benzotriazole phenolate salt or a combination of substituted benzotriazole phenolate salts. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Electret webs with charge-enhancing additives

Spunbonded electret webs comprising polylactic acid fibers, in which at least some of the polylactic acid fibers are meltspun, drawn, charged fibers that include charging additive; and, methods of making such fibers and webs.

Spunbonded web comprising polylactic acid fibers

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a fused aromatic thiourea, a fused aromatic urea compound, or a combination thereof. The change-enhancing additive may also include a hindered amine light stabilizer compound. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is an arylamino-substituted benzoic acid or an arylamino-substituted benzoic acid salt. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a divalent metal-containing substituted-mercaptobenzimidazolate salt. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Methods of preparing polymeric webs include hot melt blending of thermoplastic resins and processing aids. The process aids include hindered amine N-substituted succinimide oligomers. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media. Among the polymeric webs produced are electret webs. The processing aids also function as charge-enhancing additives for the electret webs.

Processing aids for olefinic webs, including electret webs

Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include a heterocyclic imide material which is free of fluorinated groups. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.

Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include N-substituted amino carbocyclic aromatic materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.

Electret webs are presented which include a blend of a thermoplastic resin and a charge additive. The charge additives include ester-substituted and amide-substituted trianilino triazine materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.

A method of making an electret article, from a polymeric article that has a zeta potential of greater than or less than &#x2212;7.5 millivolts. The article is charged by contacting it with an aqueous liquid that has a pH and conductivity as follows: (i) if the article has a zeta potential of &#x2212;7.5 mV or less, then the contacting liquid has pH greater than 7 and a conductivity of 5 to 9,000 microSiemens per centimeter; and (ii) if the article has a zeta potential of greater than &#x2212;7.5 mV, then the contacting liquid has a pH of 7 or less and a conductivity of 5 to 5,500 microSiemens per centimeter. An electret article made in this manner can provide improved electret performance, particularly in electret filtration articles.

Method of making electret articles based on zeta potential

The invention provides an image receptor medium which includes a biaxially oriented, melt-processed image receptive film comprising a) an immiscible blend of at least one semicrystalline polymer component and at least one ink absorptive polymer component and b) at least one inorganic filler. The image receptor medium may further include one or more additional layers such as support or adhesive layers.

Biaxially oriented ink receptive medium

Microfiber articles and methods and intermediates for their production, the microfiber articles being preferably produced from co-extruded multi-layer films, and the articles having a multi-layer construction that allows selection of the different layers to have different properties.

Microfiber articles from multi-layer substrates

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Oakdale, MN, United States of America

John M Sebastian