providing coherence of both of the fibers the melted regions being formed of partly melted regions of the low melt ing point thermoplastic fibers application_number US 5080198 A description referring to fig1 there is first of all shown and described a mat 2 made on basis of a nonwoven 1 and having fibrous parts 3 consisting predominantly of plastic these fibrous parts 3 are a mixture of thermoplastic low melting fibers 4 and higher melting fibers 5 the low melting fibers 4 consist for instance of polyolefins such as polyethylene polypropylene or the like as fibers 5 which are resistant to high temperature fibers of polyamide 6 or polyamide 6 6 are preferably used the fibers 4 and 5 are entangled in each other whereby the fibers 4 and 5 are held together this holding being increased by regions 7 of melted low melting fibers arranged distributed on the one surface 2 39 of the mat 2 as can be noted in particular from fig3 the higher melting polyamide fibers 5 are connected together by the low melting fibers 4 which bond the polyamide fibers surrounding them as shown for instance at the reference numeral 6 larger accumulations as indicated by the reference numeral 8 of the thermoplastic portions are also present fiber groups 8 which are connected by longer polyamide fibers 5 to other fiber groups 8 39 result furthermore melted regions 9 in the form of adhesive points on the.