Nonwoven laminate with wet-laid barrier fabric and related method
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United States of America Patent
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Apr 20, 1993
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N/A
app pub date -
Aug 21, 1991
filing date -
Aug 21, 1991
priority date (Note) -
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Abstract
A nonwoven laminate, having a barrier property, is made of at least one thermoplastic fiber layer bonded with a wet-laid fabric layer, made of a uniform distribution of cellulose fibers, polymeric fibers, and a binder, which is treated with a water-repellent finish. Alternatively, the wet-laid fabric layer can be made without the addition of any binders to form a tissue-type core fabric layer. In a preferred form, spunbond polyester fiber layers are ultrasonically bonded on each side of a wet-laid barrier fabric made of about 20% eucalyptus pulp, 45% staple polyester fibers of 1.5 denier, and 35% polyester fibers of finer denier of about 0.6 denier, which is bonded with an acrylic latex binder and treated with a water-repellent finish that includes a fluorocarbon compound. The resulting laminate has a desired drapability and soft hand. Combined with the low unit cost, air permeability and water-resistant barrier properties, the wet-laid barrier fabrics of the invention are suitable for industrial, hospital, and other protective or covering uses.
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