An experimental setup with a differentiated thermofixation unit that ensures autoadhesive bonding of fibres was developed, assembled, and tested. The optimum thermofixation conditions were substantiated based on the criteria of the absolute breaking load, relative elongation, modulus of elasticity, and capillarity.Fibre filters fabricated by winding yarn in a cartridge have an unstable structure so that fibres are washed out during filtration of the liquid.A blend of 40% polypropylene (linear density of T f = 0.33 tex, length L f = 60 mm) and 60% lavsan fibres (T f = 0.44 tex, L f = 51 mm) was used to increase the stability of the structure of the yarn.The yarn technology provided for loosening and picking, emulsification (with 5% aqueous solution of OS-20 in the amount of 2% of the weight of the fibres), texturing and drawing, and roving. The yarn developed, with a linear density of 290 tex, had a twist of 100 tw./m. The plan for