Method for making a hydroentangled nonwoven fabric and the fabric made thereby
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United States of America Patent
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Issued Date -
Jan 22, 2004
app pub date -
Jul 17, 2002
filing date -
Jul 17, 2002
priority date (Note) -
Abandoned
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Abstract
A process for making a single layer or multi-layer nonwoven material having improved cross-directional strength and feel, and the nonwoven material made thereby, is described. The process provides a nonwoven material including at least one layer formed of polymeric continuous filaments. The layer(s) are formed in a continuous sequential manner, i.e., a subsequent layer being formed on top of a preceding layer or layers. Thereafter, in the absence of any prebonding, the layer(s) are subjected to hydroentanglement. The basis weight of the nonwoven material is from about 17 to 150 gsm. The nonwoven material has improved properties based on treating the layer(s) by hydroentanglement. Varying the number of water jets and the pressure of the water allows variance in the properties obtained in the final product. Other physical properties can also be imparted to or changed in the nonwoven material by inclusion of an additive in a polymer melt during formation of the filaments, or by topical treatment following treatment of the layers of the nonwoven material by hydroentanglement.
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