Maro Publications

Plasma Treatment

Patent Abstracts

From 03/24/2014 
to 5/30/2012

Maro Topics

Plasma Treatment: Patent Titles

Plasma Treatment: Notes

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Patents with Abstracts

2. Plasma Treating Foams

U.S. Patent 8,475,724 (July 2, 2013), “Method and Apparatus for Plasma-Treating Porous Body,” Koichi Kono, Kotaro Kimishima, and Kazuki Kiso (Toray Battery Separator Film Co., Ltd., Tochigi, Japan).

Plasma treatment is often used to modify surfaces of materials such as hydrophilizing hydrophobic materials.  However, it is difficult to treat inner pore surfaces of foams to the same extent as the exterior surfaces.  Kono, Kimishima and  Kiso solved this problem by pushing the plasma reactants through a foam using a vacuum.   The foamed film, sheet or plate is placed on a porous support.  The plasma is formed and the reactive gas sent, flowing over the foam.  The other side of the porous support is evacuated with an aspirator or vacuum pump to 5 to 50 Pa pressure forcing the plasma through the foam and reacting with the inner surfaces.    

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1. 8,186,300 
Plasma processing apparatus
 
Ichino et al of Hitachi, Japan, developed a plasma processing apparatus for generating a fine surface pattern which includes a processing chamber, a first electrode and second, a main power source, a biasing power source, a gas supply and a control unit.  The control unit performs a control such that, during a time of transition from a stationary plasma state to quenching, the output of the main power source is not larger than the biasing powe.” (RDC 5/29/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 5/30/2012.