Method of making heteroconstituent and layered nonwoven materials
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United States of America Patent
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Dec 29, 1998
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N/A
app pub date -
Jun 18, 1997
filing date -
Jun 18, 1997
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Abstract
The present invention is directed to a method of forming a heteroconstituent nonwoven web including a mixture of different filament types simultaneously formed into the same web. The filament types may differ as to polymer composition, additive loadings, fiber size, fiber shape, and/or degree of crimping. The invention is also directed to a method of forming a multilayered nonwoven structure in which different filament types constituting different layers are simultaneously formed.
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