Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1988-05-02
1989-05-23
Cannon, James C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
2 2, 2243A, 4283111, 4283115, 4283173, 4283197, 4283199, 4284758, 4284761, 428518, A62B 1700, A62D 500, B32B 2712
Patent
active
048330108
ABSTRACT:
A multilayer chemical barrier fabric is made up of a base sheet of nonwoven polypropylene laminated on one side to a multilayer film sheet having a film of ethylene vinyl alcohol sandwiched between films of nylon with a surface film if linear low-density polyethylene bonded to the outer film of nylon and laminated on the other side to a multilayer film sheet having a central film of polyvinylidine chloride, an inner film of ethylene vinyl acetate, and an outer film of low-density polyethylene. Fabrics having this structure show resistance to breakthrough within eight hours for all fifteen chemicals listed on the ASTM F1001 chemical test battery. A composite fabric having the above structure, but omitting the multilayer film that contains polyvinylidine chloride, is also disclosed.
REFERENCES:
patent: 4234647 (1980-11-01), Murphy et al.
patent: 4284674 (1981-08-01), Sheptak
patent: 4355721 (1982-10-01), Knott et al.
patent: 4501798 (1985-02-01), Koschak et al.
patent: 4640852 (1987-02-01), Ossign
patent: 4746562 (1988-05-01), Fant
patent: 4753840 (1988-06-01), Van Gompel
patent: 4755419 (1988-07-01), Shah
Cannon James C.
Kappler Safety Group
Phillips C. A.
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