The present disclosure relates to a method for manufacturing an elastic yarn by melt spinning by means of a spinning machine including an extruder and a spin pack comprising at least one die, the method comprising at least the following steps: a preliminary cold drawing of the yarn at the outlet of the die, followed by a hot drawing of the yarn then by a cold drawing of the yarn. The present disclosure also relates to a textile comprising such an elastic yarn and to a plant configured to implement this method.

Apparatus (1) for producing a nonwoven fabric comprising a spinneret (2) and a mechanical drawing device (5) which comprises primary rollers and secondary rollers (21, 22) which are constrained to a frame (50) such that, considering a condition of use, said secondary rollers (21, 22) are movable with respect to said primary rollers (11, 12, 13) between a first position of operational disengagement from said filaments (3), and a second drawing position of said filaments (3).

Techniques produce a crimped composite thread, in which multiple individual threads are extruded in each case in the form of a plurality of strand-shaped filaments, cooled, drawn by means of a drawing device and together crimped by means of a crimping device to form the composite thread. Before the multifilament individual threads are crimped, they are entangled separately in each case by means of an entangling unit of an entangling device. A position and/or orientation of at least one of the entangling units relative to the drawing device, the crimping device and/or a further one of the entangling units is changed during the production of the crimped composite thread.

Method for manufacturing yarn, wherein said yarn comprises a plurality of continuous filaments, wherein said method comprises at least the following steps: the step of spinning, preferably melt spinning, a plurality of continuous filaments; andthe step of treating said plurality of continuous filaments by means of a pressurized fluid supplied by two or more nozzles, and wherein one or more of said nozzles deliver said fluid at a varying pressure and/or rate and/or temperature.

Method for manufacturing yarn, wherein said yarn comprises a plurality of continuous filaments, wherein said method comprises at least the following steps: the step of spinning, preferably melt spinning, a plurality of continuous filaments; andthe step of treating said plurality of continuous filaments by means of a pressurized fluid supplied by two or more nozzles, and wherein one or more of said nozzles deliver said fluid at a varying pressure and/or rate and/or temperature.

The present invention relates to a method for manufacturing a recycled polyester yarn using waste fabric. The method includes steps of: adding a predetermined chain extender to a polyester resin in which waste fabric woven with polyester yarn is melted to prevent the viscosity of the melted recycled polyester resin from dropping, and by adding a low melting point alloy agent having low melting point and low crystallinity, thereby improving extrusion (workability) in a process of melting and spinning the recycled polyester yarn and having physical properties equivalent to virgin polyester yarn.

The present invention relates to a method for manufacturing a recycled polyester yarn using waste fabric. The method includes steps of: adding a predetermined chain extender to a polyester resin in which waste fabric woven with polyester yarn is melted to prevent the viscosity of the melted recycled polyester resin from dropping, and by adding a low melting point alloy agent having low melting point and low crystallinity, thereby improving extrusion (workability) in a process of melting and spinning the recycled polyester yarn and having physical properties equivalent to virgin polyester yarn.

A composite fiber is described that is capable of forming various fiber cross section shapes with high accuracy and maintaining high dimensional stability of a cross section shape. Also provided is a method for producing the composite fiber, the method comprising: distributing a sea-component polymer and at least one other-component polymer different from the sea-component polymer; discharging the sea-component polymer and the other-component polymer distributed by the distribution plate respectively from sea-component discharge holes and other-component discharge holes of a discharge plate positioned at a downstream side of the distribution plate with respect to a polymer spinning path direction; and discharging the composite polymer from a discharge hole of a spinneret discharge plate positioned at a downstream side of the discharge plate with respect to the polymer spinning path direction.

A composite fiber is described that is capable of forming various fiber cross section shapes with high accuracy and maintaining high dimensional stability of a cross section shape. Also provided is a method for producing the composite fiber, the method comprising: distributing a sea-component polymer and at least one other-component polymer different from the sea-component polymer; discharging the sea-component polymer and the other-component polymer distributed by the distribution plate respectively from sea-component discharge holes and other-component discharge holes of a discharge plate positioned at a downstream side of the distribution plate with respect to a polymer spinning path direction; and discharging the composite polymer from a discharge hole of a spinneret discharge plate positioned at a downstream side of the discharge plate with respect to the polymer spinning path direction.

A method of making a polyhydroxyalkanoate yarn comprising a polyhydroxyalkanoate fiber is disclosed. The method comprises extruding a polymer melt comprising a polyhydroxyalkanoate composition comprising a polyhydroxyalkanoate through a spinneret, withdrawing a fiber from the spinneret, quenching the fiber, and collecting the fiber on a winding roller. The yarn exhibits an elongation at break of 50% or more to 1000% or less and a tenacity of 0.1 g/d or more to 4 g/d or less. A polyhydroxyalkanoate yarn comprising a polyhydroxyalkanoate fiber is also disclosed.