Title: Battery separator manufacturing process

Abstract: Battery separators are produced from nonwoven mats of thermoplastic fibers by wetting the fibers with a surfactant-water mixture to modify the surface properties of the fibers in the nonwoven mat, vaporizing the water while depositing the surfactant on the fibers, heating the nonwoven mat prior to compressing and then compressing to increase the fiber-to-fiber bonding as well as to form the desired structure. During compressing, ribs may be formed by using appropriate embossed rolls or press plate patterns. After the compressing step, slitting, cooling and cutting steps are carried out to produce a battery separator of the desired dimensions.

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Inventors: Buntin, Robert R. (Baytown, TX, US)
Morgan, Walter A. (Baytown, TX, US)

Application Number: 381104
Filing Date: 1973-07-20
Publication_date: 1976-03-30
Assignee: Exxon Research & Engineering Co. (Linden, NJ)
Primary Class(es): 264/137 264/134, 264/136, 264/324, 429/254
Other Classes:
US Patent Ref:

2482062	Sep, 1949	Hanson	136/146.
3084091	Apr, 1963	Volkman	136/148.
3231650	Jan, 1966	Findlay	264/324.
3272657	Sep, 1966	Zenczak	136/148.
3329559	Jul, 1967	Corbin	136/146.
3351495	Nov, 1967	Larsen	136/146.
3354247	Nov, 1967	Zehender	264/119.

Other Refs:
Primary Examiner: Kucia, Richard R.
Assistant Examiner:
Attorney: Myers; K. S., Roth; David A.