FIELD: chemistry.
SUBSTANCE: propylene/α-olefin polyblock-interpolymer is characterised by elastic recovery Re of 300% and 1 cycle, and density d in g/cm3, where elastic recovery and density satisfy the following relationship: Re>1481-1629(d).Mw/Mn equals 1.7-3.5. Melting point Tm satisfies the relationship Tm>-2002.9+4538.5(d)-2422.2(d)2. Content of monomers in the TREF fraction, which eluates at 40-130°C, where T is the numerical value of elution temperature of the ATREF peak measured in °C. Fibre made from polyblock-interpolymer has relatively high elastic recovery and relatively low coefficient of friction. If desired, the fibre can be cross-linked. Such fibres can be used to produce woven and non-woven materials.
EFFECT: invention provides high-output production of fibres and articles made from said fibres which are elastic, soft, flexible during body movement and do not cleave.
31 cl, 3 ex
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