Nonwoven binders with high wet/dry tensile strength ratio

Details Nonwoven binders with high wet/dry tensile strength ratio Nonwoven binders with high wet/dry tensile strength ratio

2007-11-20

2007-11-20

Mulcahy, Peter D. (Department: 1713)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Nonwoven fabric

C442S333000

Reexamination Certificate

active

10447009

ABSTRACT:
This invention is directed to an improved nonwoven product comprising a nonwoven web of fibers bonded together with a sufficient amount of binder comprised of a polymer comprised of vinyl acetate, ethylene, and a crosslinking monomer to form a self-sustaining web. The improvement in the nonwoven product resides in the use of a polymer having a crystalline melting point (Tm) ranging from 35 to 90° C., preferably 50 to 80° C.; measured at a heat rate of 20° C./minute. The polymer should have a crystalline heat of fusion (Hf), which typically range from about 2 to about 50 joules per gram and a low glass transition temperature (Tg), e.g., from 10 to −40° C., typically −15 to −35° C.

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