Composite elastic material having multistage elongation characteristics and method of manufacturing the same

A method of manufacturing a composite elastic material having a multiple-stage elongation comprising the steps of:

• 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.