The ornamental design for a slidefastenertape, as shown and described.
FIG. 1 is a perspective view of a slide fastener tape showing our design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left elevational view thereof;
FIG. 5 is a right elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view of the slide fastener tape with scoops mounted thereon, with the phantom lines being for illustrative purposes only and forming no part of the claimed design.