Ppg Industries, Inc.

Dennis D Leatherman

Richard A Schwarz

Paritosh M Chakrabarti

Harlan B Johnson

Malcolm Korach

Thomas A Rechlicz

James Phillip Young

Kee Van Sin

Robert B Simmons

Linda P Reinhardt

James J McGinley

Thomas H Leigh

Robert R Simmons

James A Russell

Daniel E Adams

John M Denison

George A Brons

An abrasive article comprises abrasive particles bonded to microporous material wherein the microporous material comprises (a) a matrix consisting essentially of thermoplastic organic polymer, (b) a large proportion of finely divided water-insoluble siliceous filler, and (c) a large void volume.

Abrasive article

Microporous material comprising (1) a matrix consisting essentially of thermoplastic organic polymer, (2) a large proportion of finely divided water-insoluble siliceous filler, and (3) interconnecting pores is coated with electrically conductive coating and/or printed with electrically conductive printing ink. The resulting products have many uses as electrically conductive articles, including electromagnetic interference shields and printed circuit boards. Three-dimensional printed circuit boards are disclosed.

Electrically conductive article

An active agent delivery device comprises (a) microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided water-insoluble filler of which at least about 50 percent by weight is siliceous, and interconnecting pores; and (b) a releasable active agent or precursor thereof associated with at least a portion of the filler.

Active agent delivery device

A coated article comprises a substantially continuous, moisture vapor permeable coating of hydrophobic polymer joined to one side of a sheet of microporous material comprises a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided, water-insoluble siliceous filler, and interconnecting pores.

Microporous material having a coating of hydrophobic polymer

A sterilizable or sterilized package comprises at least one microporous member comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided water-insouble siliceous filler, and interconnecting pores.

Bacteria impermeable, gas permeable package

The front side of at least one receptor sheet of a pressure-sensitive multi-part record unit comprises microporous material comprising a matrix consisting essentially of substantially water-insoluble thermoplastic organic polymer, a large proportion of finely divided, water-insoluble siliceous particles, and interconnecting pores.

Pressure-sensitive multi-part record unit

A multilayer article comprises at least one layer of substantially nonporous material fusion bonded in the absence of extrinsic intervening adhesive to at least one layer of microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided, water-insoluble filler at least about 50 percent of which is siliceous, and interconnecting pores.

Multilayer article of microporous and substantially nonporous materials

A multilayer article comprises at least one layer of substantially porous material bonded to at least one layer of microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided, water-insoluble siliceous filler, and interconnecting pores. The microporous material has regions of stretch-induced molecularly oriented polymer in the matrix.

Multilayer article of microporous and porous materials

Microporous material substrate comprising (1) a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, (2) a large proportion of finely divided water-insoluble siliceous filler, and (3) interconnecting pores is printed with printing ink.

Printed microporous material

Precursor microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided water-insoluble siliceous filler, and interconnecting pores is stretched to increase the porosity and provide regions of stretch-induced molecularly oriented polymer in the matrix.

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Pittsburgh, PA, United States of America

Dennis D Leatherman