An apparatus for continuous needless electrospinning of a liquid polymer source into a nanoscale or submicron scale polymer fiber web includes an electrospinning enclosure, a wire drive system located external to the electrospinning enclosure and a plurality of continuous electrode wires. The electrospinning enclosure includes and electrospinning zone and one or more liquid polymer coating devices where liquid polymer is coated onto the plurality of continuous electrode wires. The plurality of continuous electrode wires are parallel to each other, engaged with the wire drive system, and extend through the electrospinning enclosure and the one or more liquid polymer coating devices located therein. High voltage is applied to the plurality of continuous electrode wires in the electrospinning zone to form nanoscale or submicron scale polymer fibers from the liquid polymer coated on the electrode wires.

Provided is a method of manufacturing fiber with aligned porous structure, an apparatus, and applications of the fiber. The apparatus comprises: a fiber extrusion unit, a freezing unit, and a collection unit for collecting the frozen fibers, wherein fibers extruded from the fiber extrusion unit pass through the freezing unit. Continuous and large scale preparation of such fiber with aligned porous structure is achieved by combining directional freezing and solution spinning.

Provided are a melt blown (MB) nonwoven fabric, a laminate using the same, a method of producing a melt blown nonwoven fabric as well as a melt blowing apparatus. A melt blowing apparatus 100 includes a die 10 configured to discharge a resin melt 42 with an accompanying jet to give fiber materials, a hollow cover 20, and a collector 60. The fiber materials 50 from the die 10 are heated to a temperature equal to or higher than a crystallization temperature of crystalline thermoplastic resin inside the hollow cover 20 and collected on a collecting surface 62 of the collector 60. The hollow cover 20 and the collector 60 are separated by a distance of 5 cm or longer between a lower edge 28 of the hollow cover 20 and the collecting surface 62 in a line extending downwardly from the nozzle holes 12 in a vertical direction.

Provided are a melt blown (MB) nonwoven fabric, a laminate using the same, a method of producing a melt blown nonwoven fabric as well as a melt blowing apparatus. A melt blowing apparatus 100 includes a die 10 configured to discharge a resin melt 42 with an accompanying jet to give fiber materials, a hollow cover 20, and a collector 60. The fiber materials 50 from the die 10 are heated to a temperature equal to or higher than a crystallization temperature of crystalline thermoplastic resin inside the hollow cover 20 and collected on a collecting surface 62 of the collector 60. The hollow cover 20 and the collector 60 are separated by a distance of 5 cm or longer between a lower edge 28 of the hollow cover 20 and the collecting surface 62 in a line extending downwardly from the nozzle holes 12 in a vertical direction.

Innovation suggests methods and installations for productions of viscose filament rayon with cyclically varying linear density. According to the method of the invention, constantly synchronizated viscose solution supplying and spinning devices actuation is interrupted, as first (27) and second (28) spinning devices and arranging freshly spun yam in centrifuge system 39-5 are actuated by the use of existing power feeding installation (40-4), motors 40-1 and 40-2 and reduction gear groups 39-1 and 39-2 named as the first power feeding and actuating installation. According to the method of the invention new power feeding 40-7 and actuating; 40-3 installation is added to the same spinning machine named second power feeding and actuating installation which work runs under unit 42 control. According to the invention power shaft 21 actuation do not depends on other spinning devices actuation anymore and quantity of viscose dozed to the spinning could be changed independently of other devices work.

When to the spinning machine one or two individual installations for dying are joined suggested method allows production of dyed in one or two colours filament rayon with cyclically varying linear density.

Innovation suggests methods and installations for productions of viscose filament rayon with cyclically varying linear density. According to the method of the invention, constantly synchronizated viscose solution supplying and spinning devices actuation is interrupted, as first (27) and second (28) spinning devices and arranging freshly spun yam in centrifuge system 39-5 are actuated by the use of existing power feeding installation (40-4), motors 40-1 and 40-2 and reduction gear groups 39-1 and 39-2 named as the first power feeding and actuating installation. According to the method of the invention new power feeding 40-7 and actuating; 40-3 installation is added to the same spinning machine named second power feeding and actuating installation which work runs under unit 42 control. According to the invention power shaft 21 actuation do not depends on other spinning devices actuation anymore and quantity of viscose dozed to the spinning could be changed independently of other devices work.

When to the spinning machine one or two individual installations for dying are joined suggested method allows production of dyed in one or two colours filament rayon with cyclically varying linear density.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

The present disclosure provides a method and a device for preparing a modified poly (m-phenylene isophthalamide) (PMIA) fiber by continuous polymerization-dry-wet spinning. The method includes the following steps: (1) preparing a mixed solution of m-phenylenediamine (MPD) and a copolymerized diamine monomer in N,N-dimethylacetamide (DMAC) serving as a solvent using a cosolvent; (2) mixing isophthaloyl chloride (IPC) with the mixed solution of the MPD and the copolymerized diamine monomer in the DMAC, and conducting pre-polycondensation and polycondensation in sequence to obtain a modified PMIA resin solution; and (3) subjecting the modified PMIA resin solution to additive addition, filtration, defoaming, and dry-wet spinning to obtain the modified PMIA fiber. In the device for preparing a modified PMIA fiber by continuous polymerization-dry-wet spinning, a prepolymerization system includes a micro-mixer and a micro-reactor that are connected in sequence, and a micro-channel of the micro-reactor is designed to be heart-shaped; and a polycondensation system is a combination of multi-stage micro-screws. The present disclosure comprehensively solves the problems during preparation of the PMIA fiber. Moreover, an obtained product has a perfect structure, excellent performances, and desirable stability and controllability, and can be prepared through continuous high-efficiency production.

One or more aspects of the disclosure provides a nonwoven fabric comprising a single layer in which the single fabric layer comprises a plurality of different fibers in which each fiber type has desired functionality. In one aspect, a system for preparing a nonwoven fabric having a single fabric layer in which the single fabric layer comprises a plurality of different fiber types, is provided. The system includes a spin beam having a zoned distribution plate disposed upstream of a spinneret, the zoned distribution plate includes a plurality of distribution apertures arranged in zones, wherein each zone is configured and arranged to extrude a plurality of polymer streams that are of a different polymer type than polymer streams extruded by an adjacent zone to the spinneret to form a single layer having two or more types of fibers that are of a different type from each other.