Composite elastic material having multistage elongation characteristics and method of manufacturing the same
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United States of America Patent
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May 30, 2000
Grant Date -
N/A
app pub date -
Sep 16, 1997
filing date -
Jan 12, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A composite elastic material comprises a non-woven fabric secured to an elastic member. The non-woven fabric is elastically stretchable by about 100% or more. The sheet-like elastic member has an elastic recovery of about 60% or more and a break-down elasticity of about 200% or more. The elastic member and the non-woven fabric are secured together at a plurality of points in the stretchable direction of the non-woven fabric. The composite elastic material has multiple-stage elongation characteristics including a first stress lowering point caused by changes in the structure of the non-woven fabric, and a second stress lowering point occurring at an elongation larger than that of the first stress lowering point, caused by the fracturing of the sheet-like elastic member. The elastic material clearly shows a break-down point when stretched, and increases the flexibility of designing various products.
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