3m Innovative Properties Company

Cuno, Inc.

Other

Richard A Prince

Robert A Astle

Richard D Sale

Mark R Stouffer

Mark W Schimmel

Norbert Roessler

William J Feil, Iii

Damion J Field

Robert E Astle

William J Iii Feil

Aspects of the present disclosure provide composite carbon blocks with improved capacity for the removal of contaminants such as THMs (trihalomethanes) and trace VOCs (volatile organic compounds) found in water. In one aspect, a filtration matrix comprises a polymeric binder and an adsorptive media comprising activated carbon having a bulk density of 0.54 (0.57, or even 0.60) g/cc or greater. The carbon BET surface area can be 1100 (950, or even 550) m/g or less. The polymeric binder can be ultra high molecular weight polyethylene. Also provided are methods of making filtration matrixes.

Filter media

Provided are filtration matrixes formed from adsorptive media, such as activated carbon, and polymeric binder for use in water filtration systems. A first aspect of the invention provides methods of making a filtration matrix comprising: mixing an adsorptive media with a polymeric binder to form a mixture; impulse filling a mold with the mixture; and processing the mixture to form the filtration matrix. Filtration matrixes formed from this method are also provided. Another aspect includes methods of making a filtration matrix comprising: mixing adsorptive media with a polymeric binder to form a mixture; filling a mold with the mixture; and applying heat and pressure the mixture to form the filtration matrix, wherein the step of applying pressure to the mixture comprises compressing the mixture until a desired final shape of the filtration matrix is obtained.

Systems and methods of making molded composite blocks

A quick detachable gun barrel assembly for allowing a user to repair one's gun more quickly and easily when needed. The quick detachable gun barrel assembly includes a barrel coupling assembly being adapted to removably attach to a chamber of a gun; and also includes an elongate barrel member being detachably attached to the barrel coupling assembly.

Quick detachable gun barrel assembly

A method for sealing the edges of a filter sheet (,) with wax to create a fluid-impermeable wax seal (,) enclosing a non-sealed portion (,). The method includes applying melted wax to the edges of the filter sheet, heating the treated filter sheet such that the wax permeates through the edges thereof, and then allowing the filter sheet to cool such that the wax congeals. The wax of the fluid-impermeable wax layer (,) has a durometer reading of about 75 to about 100 Shore A hardness at 25&deg; C. and 85&deg; C., a melt point of about 110&deg; C. to about 180&deg; C., a viscosity of less than about 100 cp at 155&deg; C. and preferably includes ethylene bis stearamide. The wax layer increases the useful life of the filter sheet while providing a sheet which is easily released from a filter press and which retains integrity along the seal during repeated hot water sanitations.

Method for sealing the perimeter of a filter sheet

A filter sheet positioned between plates (14) of a filter press has a fluid-impermeable wax layer (11) sealing the sheet's perimeter. The wax preferably comprises ethylene bis stearamide and has a durometer reading of about 75 to about 100 Shore A hardness at 25.degree. C. and 85.degree. C., a melt point of about 110.degree. C. to about 180.degree. C., and a viscosity of less than about 100 cp at 155.degree. C. The wax layer increases the useful life of the filter sheet while providing a sheet which is easily released from a filter press and which retains integrity along the seal during repeated hot water sanitations.

Growing community of inventors

Westfield, MA, United States of America

Richard A Prince