Maro Publications

Microporous Materials

Patents with Abstracts

*1/23/2012

Maro Encyclopedia

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Patents with Abstracts

2. 8,354,185 
Microporous polyethylene film with good property of strength and permeability at high temperature 

Jung et al of SK Innovation Co., Ltd., South Korea, developed a microporous polyethylene film for use as battery separator.  The microporous polyethylene film has a film thickness of 5-40 mu.m, a porosity of 35-55%, a permeability from (2.5 to 10) x 10 5 Darcy, a puncture strength of at least 0.10 N/.mu.m at 90 C., a puncture angle of at least 30.degree. at 90.degree. C., and a permeability from (2.0  to 8.0) x 10-5 Darcy after shrinking freely at 120 C. for 1 hour. The microporous polyethylene film has very superior puncture strength and thermal stability at high temperature.  Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.

1. 8,354,052 
Process for manufacturing microconduit networks formed by electrospinning techniques 

Guenthner and Hess of the US Navy, Washington, District of Columbia, developed a high-speed mass production, for fabricating a microconduit network structure, that is, a series of highly interconnected pores or channels in which the total volume fraction occupied by pores is on the order of 10% or less.  The low porosity of the microconduit network structure combined with the small diameter of the pores provides for significant benefits in the mechanical properties of porous structures while permitting the rapid transport or circulation of fluids within the structure. The network is formed by electrospinning polymer solutions into a fibrous web with the special characteristic that most filaments share a branching connection to at least two other filaments, thereby forming a continuously connected network encompassing many filaments.  Once deposited, the filament network is encapsulated in a liquid matrix precursor material. The precursor may be polymeric (thermally or UV cured), ceramic, or liquid metal.  The polymer filaments are dissolved away with a solvent forming a microconduit network.

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Interested!!
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(RDC 6/5/2012)

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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 2013 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 1/19/2013.