Patent ID: 6962731
Filing Date: 2005-11-08
Classification: B05D,C03C,D06B

Abstract:
1. A method of continuously modifying an elongated substrate with multiple modifying agents comprising: providing a first processing chamber configured for applying a first modifying agent to the elongated substrate, the first processing chamber comprising a first region, a second region, and a constricted medial region between the first region and the second region and configuring the first processing chamber to accept a first treatment mixture into the constricted medial region during continuous movement of the continuous substrate through the first processing chamber; providing a first treatment mixture comprising the first modifying agent in a first carrier medium, the first carrier medium being selected from the group consisting of a supercritical fluid, a near-critical fluid, a superheated fluid, a superheated liquid, and a liquified gas, such that the first modifying agent separates from the first carrier medium upon a pressure drop when the first treatment mixture is introduced into the constricted medial region; applying the first modifying agent to the continuous substrate; providing a second processing chamber configured for applying a second modifying agent to the continuous substrate after the first modifying agent is applied to the continuous substrate; applying the second modifying agent to the continuous substrate after the first modifying agent is applied to the continuous substrate; providing a first end seal disposed adjacent to the first processing chamber configured for substantially isolating fluids present in the first processing chamber from the surrounding atmosphere; providing a second end seal disposed adjacent to the second processing chamber configured for substantially isolating fluids present in the second processing chamber from the surrounding atmosphere; providing a passageway configured for allowing continuous passage of the continuous substrate through the first end seal, the first processing chamber, the second processing chamber, and the second end seal in series; and continuously passing the continuous substrate through the passageway.