Cory Scott Rogers

US Patent:

20100272941, Oct 28, 2010

Filed:

Nov 15, 2008

Appl. No.:

12/743019

Inventors:

Srinivas Cherukupalli - Andhra Pradesh OR, US
Steve Gerts - Corvallis OR, US
Daniel Lee - Lebanon OR, US
Cory Rogers - Eugene OR, US
Richard W. Pekala - Corvallis OR, US

Assignee:

Entek Membranes LLC - Lebanon OR

International Classification:

B32B 3/26
B32B 3/10

US Classification:

428 413, 4283155, 4281951, 4283007

Abstract:

A durable water- and oil-resistant, breathable thin microporous membrane () exhibits good hand, feel, and drape. The structure of microporous membrane is a thin polymer matrix that includes a polyolefin material having a bulk region () between first and second major surfaces (). The bulk region includes multiple interconnecting micropores () extending between the surfaces to form a polyolefin membrane () that exhibits inherent hydrophobicity and moisture vapor transmission properties. An applied fluorochemical treatment () imparts oleophobicity to the polyolefin membrane by imparting a lower surface energy to polyolefin membrane to provide oil and surfactant resistance, and to maintain moisture vapor transmission through the microporous structure. Preferred embodiments of microporous membrane also include an inorganic filler material such as calcium carbonate. In one application, the fluorochemically treated microporous polyolefin membrane is bonded to a fabric material to form a fabric laminate with optimized permeability characteristics.

US Patent:

20160028060, Jan 28, 2016

Filed:

Mar 13, 2014

Appl. No.:

14/775608

Inventors:

- Lebanon OR, US
Chi Thuong-Le La - Happy Valley OR, US
Cory S. Rogers - Eugene OR, US
Jeffry M. Frenzel - Albany OR, US
Robert Waterhouse - Lebanon OR, US
David P. Walker - Wallsend, GB

International Classification:

H01M 2/16
B29C 47/00
B29C 71/00
H01M 2/14

Abstract:

A lead-acid battery separator with ultralow resistivity results from high porosity, controlled pore () size distribution, and an ionic surfactant () with a long alkyl side chain () that is anchored to the polymer matrix () of a silica-filled polyethylene separator. The surfactant cannot be easily removed or washed away and thereby imparts sustained wettability to the separator. Controlling the number of, and volume occupied by, the pores (i.e., porosity) and pore size distribution of the separator contributes to a reduction in electrical (ionic) resistivity.