being very short or short but is rather employed to refer to thinness of the fibers to form a pack a determined amount of mass 23 may be wrapped into cover 24 which may comprise a laminar synthetic material a u201c kevlar u201d clothe etc then the pack may be compacted into a conventional press 26 as illustrated in fig4 alternatively the pack may be compacted by extracting the air from the pack by means of a vacuum chamber not illustrated because it is a well know technique according to the inventive method the threads may be guided only by passing through tube 7 or by passing through tube 7 located downstream cylinders 5 and through sleeve 9 as illustrated in fig1 for guiding all the threads intimately close to each other the step of bringing the threads into the entangling means may comprise passing the separated microfibers through at least one non abrasive rough surface which surface may comprise a plurality of hook shaped projections or nail projections the at least one surface may comprise a plate or two opposing plates either flat or curved or at least two cylinders including respective outer non abrasive surfaces with the surface or surfaces being non abrasive and rough or being provided with a plurality of hook shaped projections or nail projections once the pack is compacted as indicated by.