3m Innovative Properties Company

David B Redmond

Christopher Stewart Lyons

Marvin E Jones

Thomas J Blong

Seyed Abolhassan Angadjivand

Jeffrey L Solomon

Mark W Muggli

Maria P Dillon

Dennis E Hull

Joseph G Walton

The multilayer film serves as a laminate. In some embodiments, the film is a multilayered structure that, in its base form, encompasses an intermediate layer with first and second outer layer affixed to opposing sides of the intermediate layer. In some embodiments, the first outer layer is a semi-crystalline fluoropolymer. In some embodiments, the intermediate layer includes a polyester and the second outer layer is an olefinic polymer.

Fluoropolymer containing laminates

The multilayer film serves as a laminate. The film is a multilayered structure that, in its base form, encompasses an intermediate layer with first and second outer layer affixed to opposing sides of the intermediate layer. The first outer layer is a semi-crystalline fluoropolymer. The intermediate layer includes a polyester and the second outer layer is an olefinic polymer. The layers are bonded together in the noted order to provide the multilayer film.

A method of making a respirator, which method includes placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer. The electret is disposed in the respirator body such that air passes through it before being inhaled by a respirator wearer. The electret includes a nonwoven web that has fluorinated polymeric microfibers and that has at least about 25% atomic fluorine as detected by ESCA and a CF:CFratio of at least about 0.45.

Method of making a respirator that has a fluorinated electret

An electret is described that includes a surface modified polymeric article having surface fluorination produced by fluorinating the polymeric article.

Method of using fluorinated electrets

An electret is described that includes a plasma surface modified polymeric article having plasma surface fluorination produced by fluorinating the polymeric article.

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Saint Paul, MN, United States of America

David B Redmond