Elastic laminate employing nonwoven formed by bi-component fibers of ethylene-propylene random copolymer

摘要

The present invention is directed to an elastic laminate. The elastic laminate includes: an elastomeric material layer having a first surface and a second surface opposing the first surface; and a nonwoven layer which is joined to the first surface of the elastomeric material layer to form a laminate. The nonwoven layer includes bi-component fibers having a sheath/core structure. The sheath contains an ethylene-propylene random copolymer which contains from about 7 mol % to about 15 mol % of ethylene comonomer randomly distributed in the polymer backbone. The ethylene-propylene random copolymer has a PEP Ratio of from about 50 mol % to about 100 mol %. The laminate is mechanically stretched to form an elastic laminate. By employing the nonwoven layer of the present invention in the elastic laminate, the elastic laminate provides an improved elongation ability against the mechanical stretching applied thereto during the mechanical stretch process and/or during the use of articles. Consequently, the elastic laminate of the present invention can prevent an undesirable break of the elastic laminate, such as shredding and/or tearing.