Reclosable fasteners for plastics bags and the like

摘要

A reclosable fastener comprises a male/female closure 10 between a pair of opposed base members 16 which include zones of different material 18 coextruded therewith overlying or inset into the base member in such a manner as to provide a flat outer surface. The overlying or inset material may be a weld-enhancing material, a weld retarding material or a weld prevention material. The inset zones may also be provided on flangeless zippers