Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-02-28
1993-04-13
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
1563066, 1563082, 428284, 428296, 428297, 428298, 428282, 429247, 429249, 429254, B32B 2734
Patent
active
052021785
ABSTRACT:
A nylon battery separator material for use in nickel-cadmium batteries has a laminated construction comprising a nonwoven web of nylon staple fibers sandwiched between a pair of webs of spun-bonded nylon fibers. The staple web comprises nylon 6 and nylon 6-6 fibers. The spun-bonded fibers are nylon 6-6. During manufacture the staple web is fed between the webs of spun-bonded nylon fibers. The three webs form a sandwich which is passed through a stack of heated calendar rolls. The maximum temperature of the stack of calendar rolls is greater than the softening temperature of the nylon 6 fibers, but less than the melting temperature of the nylon 6-6 fibers. Upon cooling, the webs of spun-bonded fibers will be bonded to the staple web by the re-solidified nylon 6 fibers, whereby the laminated battery separator material is formed.
REFERENCES:
patent: 3595731 (1971-07-01), Davies et al.
patent: 3770562 (1973-11-01), Newman
patent: 4039711 (1977-08-01), Newman
patent: 4863785 (1989-09-01), Berman et al.
patent: 5089360 (1992-02-01), Kanno et al.
Bell James J.
International Paper Company
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