Patent ID: 8415263

Claim:
A composite material formed by a process comprising laminating a conjugate spunbonded nonwoven fabric and a stretchable layer as an integral, wherein the conjugate spunbonded nonwoven fabric comprises conjugate fibers in a sheath-core form where a sheath has a low-melting point component and a core has a high-melting point component, or in a conjugate form of the low-melting point component and the high-melting point component where a portion of the high-melting component is exposed at 50% or less of a surface area of the conjugate fiber, wherein the high-melting point component has a melting point higher than a melting point of the low-melting point component, the conjugate spunbonded nonwoven fabric has a plurality of thermocompression bonded portions that are formed by a first partial thermocompression bonding process and are consecutively distributed in a length direction (machine direction, MD) thereof, wherein each of the thermocompression bonded portions includes fine folded structures including alternate hill regions and valley regions in a width direction (cross direction, CD) in fabrication of the conjugate spunbonded nonwoven fabric, a distance between neighboring hill regions is 100-400 μm in average, the conjugate spunbonded nonwoven fabric exhibits stretchability through spreading of the fine folded structures, and the conjugate spunbonded nonwoven fabric and the stretchable layer are laminated as an integral by a second partial thermocompression bonding process, wherein an area ratio of a plurality of compression-bonded portions is 4-12%, and a pattern of the compression-bonded portions is not entirely the same as a pattern of the thermocompression bonded portions of the conjugate spunbonded nonwoven fabric.