British-american Tobacco Company Limited

Martin Coleman

Paul David Case

Colin Campbell Greig

John Lawson Beven

Peter R White

Cigarette filter rod employs as filtration material moisture disintegrative paper. The moisture disintegration index of the paper does not exceed 20.

Smoking articles

Tobacco smoke filtration material

An extruded filtration material which is degradable and comprises either a plastics material or an inorganic material having a melting point above the operating temperature, a polysaccharide expansion medium, a binder and water. These ingredients are fed to an extruder and subjected to an extrusion process which involves a pressure reduction, upon extrusion from the exit die, of up to about 70 bars so that swelling of the extrudate occurs to give a cellular structure. When exposed to the natural weather conditions, tobacco smoke filter elements comprising such material degrade without leaving a fused amalgamation of plastics or inorganic material.

Growing community of inventors

Southampton, United Kingdom

Martin Coleman