SPUN BONDED NONWOVEN FABRIC, LAMINATES MADE BY USING THE SAME, AND PROCESSES FOR PRODUCTION OF BOTH

摘要

A spun bonded nonwoven fabric which is constituted of conjugated fibers (1) made of a combination of at least two polymers selected from among (1) ethylene polymers specified in melt flow rate (MFR), density, and Mw/Mn ratio (wherein Mw is weight-average molecular weight and Mn is number-average molecular weight), (2) specific propylene block copolymers which each contain both a part soluble in n-decane at 25°C and a part insoluble therein at 25°C, and (3) propylene polymers other than the block copolymers (2) and which has a specific volume of 10 cm<3>/g or above; and laminates which each comprise as the essential constituents both a layer of the above spun bonded nonwoven fabric and a layer of a nonwoven fabric having a specific volume smaller than that of the spun bonded nonwoven fabric.