Nonwoven textiles are not produced either by interlacing or interloping, but are rather bonded together by adopting thermal, chemical, or mechanical techniques, or a combination of these techniques. The constituent fibres or filaments may be randomly or preferentially oriented in the nonwoven textiles. Nonwoven textiles can be manufactured by a process consisting of web formation with the constituent fibres or filaments first and then bonding these fibres mechanically, thermally, or chemically. Nonwoven structures are classified into various categories based on the fibre bonding mechanism. Mechanically bonded (needle-punched, hydro-entangled, stitch-bonded), thermally bonded (melt-blown), and chemically bonded (adhesive bonded) are the broad classifications of nonwoven geotextiles.