A composite yarn consisting of an elastomeric yarn intermingled with a non-elastomeric multifilament yarn and a process for its manufacture comprising the steps of: feeding an elastomeric yarn and a non-elastomeric multifilament yarn through a draw zone adapted to temporarily stretch the elastomeric yarn and to draw the non-elastomeric multifilament yarn and false twisting the elastomeric yarn and the non-elastomeric multifilament yarn together to form a false twisted doubled yarn to a heat sett...

Modifying a polyester with special chain-brancher residues in carefully controlled amounts to provide a draw-texturing feed yarn that can be draw-textured at a speed of 1,000 mpm without excessive filament breaks, and with other advantages in the resulting textured yarns, such as improved bulk and dyeability over prior polyester yarns that could not be satisfactorily textured under similar conditions.

In the friction spinning of yarns, staple fibres are supplied to a yarn formation zone in which the yarns end is rotated by frictional contact with at least one twisting element. In the yarn form zone, a jet of air is applied to the yarn or forming yarn by nozzle to increase the frictional forces between the yarn or forming yarn and the twisting elements. The formed yarn is continuously removed from the yarn formation zone.

A method of forming a craft yarn having unique properties and a wide variation of physical characteristics, and consisting of a selected plurality of parallel-laid yarns encased along their length by a zig-zag stitch of selected thread.

A method of dyeing yarns is provided wherein a single yarn or a web of parallel yarns is passed through a falling stream of liquid dyestuff which is substantially at boiling temperature when it contacts the yarn. The falling stream may be interrupted intermittently or may be traversed to and fro of the yarn to dye the yarn intermittently. Apparatus for conducting the method is described.

Spunlike yarns having free ends are made from continuous filament yarn by fluid-jet texturing. The fibrous elements that make up the yarn have irregular and varying cross-sectional shapes, said fibrous elements being forked and merged in a fortuitous manner. The spunlike yarns may also contain fibrous elements that extend substantially continuously throughout the length of the yarn.

Manufacture of variegated yarns from thermoplastic polymer by incorporation of color at extrusion with interval of change of type or quantity of color greater than 0.03 T, where T is half-decay time for instantaneous injection of color.

A process for the treatment of glass yarn in which the yarn is impregnated with a low viscosity solution of a thermosetting binder in an organic solvent, the viscosity of said solution being not greater than 50 centipoise (=0.05 Pascal seconds) at 25.degree. C.; solvent is then evaporated from the impregnated yarn; the yarn is further impregnated with a high viscosity solution of a thermosetting binder in an organic solvent; and solvent is again evaporated from the impregnated yarn. The process ...

Yarn portions, particularly yarn ends, are joined together without using a knotting technique by positioning the yarn portions alongside each other and introducing such portions through an inlet of apparatus having two passages extending separately away from the inlet. Fluid flow is directed alternately along one then the other of the passages so as to move the yarn portions backwards and forwards between two passages so as to cause the yarn portions to be joined or spliced together.

In order to interlace a plurality of textured filaments and produce bundled yarn, a plurality of textured filaments having reverse twists creating opposing torques, of which the bundled yarn is to be formed, are initially subjected to a prescribed degree of tension. The tensioned filaments are then brought together and permitted to relax. Upon relaxing, the textured filaments tend to entangle with each other to form the bundled yarn having a resultant neutral torque. The entanglement is carried ...