Wet-laid non-woven fabric and method for making same
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United States of America Patent
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-
May 16, 1995
Grant Date -
N/A
app pub date -
Mar 22, 1993
filing date -
Mar 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Non-woven fabrics and methods and apparatus for their manufacture are disclosed. The fabrics have excellent mechanical strength and hand, and have a substantial uniformity of constituent fibers even at low basis weights. The fabric comprises chopped fibers of a synthetic polymeric thermoplastic material, which serve as binder fibers, and chopped fibers of a synthetic polymeric material which need not be a thermoplastic, which serve as bonded fibers. No extraneous binder materials need be present in the fabric. During manufacture, the binder fibers are uniformly dispersed in an aqueous liquid with the bonded fibers. The fibers are wet laid to form a web which is subsequently dried. During drying, the web is physically supported to prevent fracture. Also, during drying, the web is heated sufficiently to cause the binder fibers to bond to the bonded fibers, thereby forming the finished fabric.
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