Process for the production of chemically bonded non-woven sheet materials containing a binder of microheteroporous structure
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United States of America Patent
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Aug 9, 1983
Issued Date -
N/A
app pub date -
Apr 26, 1982
filing date -
Mar 4, 1980
priority date (Note) -
Expired
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Abstract
A process for the production of chemically bonded non-woven material, such as synthetic leather, is disclosed wherein a fiber fleece is impregnated with a heat sensitized polymer dispersion and the composition is destabilized to form a porous gel structure. Finally, the polymer is crosslinked at below 150.degree. C. and is dehydrated. Additionally, cut fibers of polyester of polyamide are formed into a fleece and an aqueous dispersion of butadiene-styrene coagulant and a curing composition is impregnated through the fleece. The binder is gelled and cured in superheated steam. The products obtained are soft and possess excellent physical and mechanical properties as well as superior dynamic stressability.
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