A sewing thread made of synthetic fibers having an elongation at a break between 25% and 85% and an elastic tensile elongation of between 30% and 95% of the elongation, determined by a measuring strength, corresponding to 70% of the absolute strength of the respective sewing thread.

A textile thread having a core and a sheath surrounding the core. The core, formed of high-tenacity synthetic organic endless fibers, is tightly wound by slit film tapes made of polytetrafluoroethylene (PTFE) in the S-direction and the Z-direction, or vice versa, and the slit film tapes forms a sheath.

A fishing line including a core of at least one multifilament yarn based on synthetic organic fibrous materials such as polyethylene of an ultra-high molecular weight, and a casing formed from polytetrafluorethylene (PTFE) film tape which is wound around the core in the S direction and the Z direction or vice versa.

A flexible hose comprising a tube, a knit fabric, and a cover. The knit fabric comprises a hybrid yarn which comprises a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers. The hose exhibits significantly improved burst pressure and/or improved impulse fatigue resistance.

A process for producing composite yarns comprises the steps of first wrapping a second yarn around the perimeter of and along the length of a first yarn and then heating the yarn intermediate produced by such wrapping to produce a composite yarn. When a heat-shrinkable yarn is used in producing such a composite yarn, the shrinkage of the heat-shrinkable yarn enables the production of composite yarns possessing aesthetic qualities similar to those exhibited by yarns produced by much more complicated processes, such as boucle and chenille yarns.