as shown in fig1 is accordingly provided with a substrate layer shown in the cross section in fig2 the scale ratios shown in fig2 are not entirely appropriate to be able to clearly reproduce the layer structure to the viewer furthermore it should be emphasized that the structure of a closure part shown in fig1 constitutes only one possible fabric implementation and that a flame retardant closure with a plurality of backing fabric structures for a closure part in addition to functional and pile threads could be implemented the embodiment as shown in fig1 and 2 therefore is of a rather exemplary nature to fix the backing fabric 14 with its individual threads and thread systems it is intended that they be provided with a finish preferably a polyurethane finish pur this finish structure is conventional and is accordingly not detailed in fig2 underneath the backing fabric 14 with its pur finish an adhesive layer 30 is provided which need not be pressure sensitive and preferably made in the form of a reactive polyurethane cement itself need not be flame retardant either underneath the adhesive layer 30 of adhesive is a substrate layer 32 preferably covering the entire understructure of the backing fabric 14 the thickness or the height of the structure can essentially correspond to the thickness or the height of the structure of the backing fabric 14 this substrate layer 32 preferably is formed.