Composite elastic material having multistage elongation characteristics and method of manufacturing the same
First Claim
1. A composite elastic material having a multiple-stage elongation property comprising:
- a non-woven fabric which is stretchable along at least one direction and has a break-down elasticity along said direction of about 100% or more; and
a sheet-like elastic member having an elastic recovery of about 60% or more and a break-down elasticity of about 200% or more;
said non-woven fabric and said elastic member being secured together at a plurality of points to form a composite elastic material having a first stress lowering point caused by changes of structure of said non-woven fabric while being stretched along said direction, and a second stress lowering point occurring at an elongation larger than that of said first stress lowering point caused by a break-down of said sheet-like elastic member.
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Accused Products
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.
141 Citations
31 Claims
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1. A composite elastic material having a multiple-stage elongation property comprising:
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a non-woven fabric which is stretchable along at least one direction and has a break-down elasticity along said direction of about 100% or more; and a sheet-like elastic member having an elastic recovery of about 60% or more and a break-down elasticity of about 200% or more; said non-woven fabric and said elastic member being secured together at a plurality of points to form a composite elastic material having a first stress lowering point caused by changes of structure of said non-woven fabric while being stretched along said direction, and a second stress lowering point occurring at an elongation larger than that of said first stress lowering point caused by a break-down of said sheet-like elastic member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of manufacturing a composite elastic material having a multiple-stage elongation comprising the steps of:
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placing a non-woven fabric having an elongation along at least one direction and a break-down elasticity along said direction of about 100% or more on a sheet-like elastic member having an elastic recovery of about 60% or more and a break-down elasticity of about 200% or more; securing said non-woven fabric and said elastic member together at a plurality of discontinuous securements to form a composite material; and drawing said composite material in a stretchable direction of said non-woven fabric with an elongation degree smaller than the break-down elasticity of said elastic member to have a first stress lowering point caused by changes of structure of said non-woven fabric and a second stress lowering point occurring at an elongation larger than that of said first stress lowering point caused by break-down of said sheet-like elastic member. - View Dependent Claims (31)
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Specification