Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Coated or impregnated woven – knit – or nonwoven fabric which... – Coated or impregnated natural fiber fabric
Reexamination Certificate
2006-12-26
2006-12-26
Morris, Terrel (Department: 1771)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Coated or impregnated woven, knit, or nonwoven fabric which...
Coated or impregnated natural fiber fabric
C442S327000, C442S374000, C525S330300, C525S328200
Reexamination Certificate
active
07153791
ABSTRACT:
This invention is directed to an improvement in binders particularly suited for use in preparing nonwoven products and to the nonwoven products. The improved binders comprise a blend of emulsion polymerized ethylene-vinyl chloride (EVCl) polymer and an emulsion polymerized self crosslinkable vinyl acetate-ethylene-N-methylolacrylamide (VAE-NMA) polymer. The blends of the EVCl polymer emulsion and the VAE-NMA polymer emulsion can be applied to cellulose and cellulose/synthetic nonwoven substrates and cured in the absence of an acid catalyst to provide a self-sustaining web having excellent wet strength performance. The blends of EVCl and VAE-NMA polymers do not require an acid catalyst to facilitate cure.
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Air Products Technical Bulletin 151-470, AIRFLEX® 105 Emulsion for Nonwovens, 1980, 1984.
Air Products Technical Bulletin 151-9317, AIRFLEX® 108 Ultra-Low Formaldehyde Emulsion for Nonwovens, 1992.
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Boylan John Richard
Perry Conrad William
Air Products Polymers, L.P.
Bongiorno Mary E.
Brewer Russell L.
Morris Terrel
Salvatore Lynda M.
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