as polypropylene and polyethylene or may be made from an elastomeric thermoplastic polymer elastomeric thermoplastic polymer may be those made from styrenic block copolymers polyurethanes polyamides copolyesters ethylene vinyl acetates eva and the like generally any suitable elastomeric fiber or film forming resins or blends containing the same may be utilized to form the nonwoven webs of elastomeric fibers or elastomeric film commercial examples of such elastomeric copolymers are for example those known as kraton u00ae materials which are available from shell chemical company of houston tex kraton u00ae block copolymers are available in several different formulations a number of which are identified in u s pat no 4 663 220 hereby incorporated by reference other exemplary elastomeric materials which may be used to form an elastomeric layer include polyurethane elastomeric materials such as for example those available under the trademark estane u00ae from b f goodrich amp co polyamide elastomeric materials such as for example those available under the trademark pebax u00ae from the rilsan company and polyester elastomeric materials such as for example those available under the trade designation hytrel u00ae from e i dupont de nemours amp company various mixtures of syndiotactic polypropylene with isotactic polypropylene were produced in order to measure the bonding window of the resultant web control fabrics were also produced having no syndiotactic polymer two sets of tests were run producing fabrics with stabilizer and pigment and fabrics with stabilizer and without pigment in order to determine whether the syndiotactic polypropylene was responsible for the change in the bonding window or whether another mechanism was responsible the.