Non-woven fabric, and sheet and artificial leather produced from the same
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United States of America Patent
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May 20, 2003
Grant Date -
N/A
app pub date -
May 1, 2000
filing date -
Oct 31, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A non-woven fabric having such a structure that fine fibers having a small fineness are entangled with one another and a sheet obtained by impregnating the non-woven fabric with an elastic polymer satisfy the following requirements: the fine fibers should be obtained by splitting a strippable and splittable composite short fiber comprising at least two components; the fine fibers should have a monofilament size of 0.01 to 0.5 denier; the fine fibers should form a fine non-woven fabric structure that they are entangled with one another at random; the apparent density should be 0.18 to 0.45 g/cm.sup.3 ; the average area of spaces between fibers in the cross section of the non-woven fabric measured by the image analysis of an electron scanning microscope should be 70 to 250 .mu.m.sup.2 ; and the non-woven fabric should have such a uniform structure that the standard deviation of the area of a space between fibers in the cross section of the non-woven fabric measured by the image analysis of the electron scanning microscope is 200 to 600 .mu.m.sup.2. The non-woven fabric and sheet are advantageously used as a substrate for artificial leather.
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