3M Innovative Properties Company

Ian R I Harding

Stephen M Sanocki

Richard P Merry

Roger L Langer

Ryan C Shirk

Loyd R Hornback, Iii

Gary F Howorth

Joseph C Peisert

A method of making nonwoven fibrous materials suitable for use in a pollution control device or as a firestop, where the method comprises: providing a first slurry comprising water, first inorganic fibers, a first organic binder, and a first neutral pH flocculent; removing first waste water from the first slurry; optionally forming a first nonwoven fibrous material from the first slurry; providing a second slurry comprising a quantity of the first waste water, an optional quantity of relatively clean water, second inorganic fibers, a second organic binder, and a second flocculent that is the same and/or a different flocculent than that used in the first slurry; and forming a second nonwoven fibrous material from the second slurry. The addition of the first waste water in the second slurry does not adversely affect the flocculation of the second organic binder in the second slurry.

Using recycled waste water to make nonwoven fibrous materials suitable for use in a pollution control device or in a firestop

The invention provides a method of making a flexible and self-supporting insulating end cone liner comprising resilient and compressible non-intumescent material molded into a single, continuous piece having a three dimensional cone shape, with the insulating material comprising inorganic fibers and a binder, as well as a method of making a pollution control device that includes such an end cone liner.

Method of making self-supporting insulating end cone liners and pollution control devices

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Mahtomedi, MN, United States of America

Ian R I Harding