Viscose Staple Fibre

Viscose Staple Fibre

Viscose staple fibre is defined by ISO standards as regenerated cellulose obtained by the viscose process. Chemically, staple fibre consists only of natural cellulose polymers, 11 – 13 % moisture, and a finishing agent, typically 0.5 – 1 % for textile operations.

Viscose staple fibre is spun continuously on spinning machines having spinnerettes dipped vertically into a circulating spinbath. The coagulated and regenerated viscose filaments are bundled together and collected by yarn guides onto godets. The viscose cable from these godets is collected further to form a tow. This tow passes through a stretching unit which generates a pre-defined stretch and thus influences the tensile properties of the tow/fibre. From the stretching unit the tow is guided through a cutting machine, where pre-defined lengths of staples are cut. These staples are flushed into a CS2 recovery trough for elimination of the physically bound CS2 and its recovery. Secondly, the bundles of staple fibre are opened for better accessibility of the following washing. The fibres are now led to the aftertreatment machine, where various deacidification, desulphurisation, bleaching and washing sequences are passed through. Finally, softeners are applied. The fibre is then led into dryer for a controlled dehumidification.

We deliver ideal solutions over the whole production procedure meeting highest standards to be chosen out of modular design.

Staple Fibre Spinning

Standard design

  • Up to 150 tons fibre capacity per day for a single line regular or high tenacity fibres
  • Titre range from 1.1 dtex to 1.7 dtex, or higher
  • 140 spinning positions (extendable)
  • Up to 76’000 holes per spinning position
  • Spinning speed: up to 80 meters per minute
  • Electonically controlled drive system which allows a precise spinning speed
  • Stepped godets with 3-stage shape for pre-stretching, individually driven

Features

  • Easy and simple operation
  • Versatility increasing production flexibility and lowering product losses
  • Optimal spinbath distribution in the spin trough for high spinbath flow without turbulences
  • Stretch ratios up to 120% by utilising stretching devices with individual drive
  • Sealed design to ensure an optimal working environment
  • Maximum recovery of sulphur compounds by using a refined integrated exhaust system
  • Complete range of spinneret cleaning and inspection unit

Spinneret

Our Spinneret and Spinning Head

  • World-Leading Innovation
  • Optimized viscose flow with no dead spaces

Our Automatic Spinneret Cleaning Machine

  • High resistant and durable construction with high corrosion resistance materials
  • High end automation and robotics technology for reliable operation
  • Washing tanks are covered during treatment steps, thus the expulsion of vapours released to the room is minimized.
  • Fully automated system with programmable treatment cycles, which allows adjusting each parameter (temperatures, residence times, over-stepping function for washing steps etc.).
  • The programs can be stored individually for different process/ cleaning requirements.

Stretching Unit

Process Function

Stretching of fibre tow between godets and stretching device for molecular orientation and to achieve high fibre tenacity.

Features

  • Tow drawn by synchronous driven rollers
  • Tow winds up on 3/4 of single roller
  • No slipping or sliding of tow on rollers
  • Number of rollers can be customized
  • Each roller is operated by an individual drive for synchronous control with the spinning machine
  • Fibre tow drawn in band form
  • Stretch rate adjustable within a very broad range
  • integrated exhaust system
  • Rollers made of special highly resistant material

Cutting Machine

We offer standard and individual solutions for the cutting of fibers. If You intend to cut fibers, filament, yarn, tow or other similar structures. The cutting can be done in a wet or dry environment, depending on the type of fibre, the capacity and requirements. Our description for the standard design is as follows:

Standard Design

  • One sided machine with two cutting heads, one in operation and one as stand-by
  • Right or left hand execution
  • Main roller, direct driven; adjustable guide roller
  • Cutting heads with cutter disc, direct driven
  • Staple length from 25 to 105 mm
  • The capacity is 3.5 million to 16 million dtex
  • Tow speed from 20 to 100 m/min (for viscose)

Features

  • Suitable for high-speed cutting of cellulosic fibre (viscose, lyocell, carbamat) and other wet spun Man Made Fibres
  • Compact design, easy installation
  • The knives are smoothly and constantly guided and at the same time sharpened as they are pressed with pre-selected and constant spring force against the grinding ring
  • Variable cutting speed electronically adjustable during operation and synchronised to spinning speed
  • Staple fibre length electronically adjustable
  • Simple, quick and safe changing of the knives
  • Non pulsating knives
  • Special alloys used for knives and wearing parts allow longer service life

Aftertreatment

Customized Design

  • Fibre capacity up to 400 tons per day
  • Pneumatic squeezing of the fleece after each treatment and washing zone, thereby lowering consumption of chemicals
  • Suitable for treating cellulosic fibres (viscose, lyocell, carbamat)
  • Electric driven upper and lower rollers of the high pressure units
  • Softening equipment suited for almost all makes of softening agent

Features

  • Optimised counterflow washing and heat recovery
  • Squeezing units can be moved within the zones for optimising the process
  • Proper opening of the fibre fleece by wet opener with electronic controlled fleece holding device
  • Humidity after the final pressing of approx. 50 %
  • Frame work made of stainless steel
  • Suitability for chlorine-free bleaching
  • Minimised maintenance, less down-time
Do you have questions about our products or technologies?
We will be happy to help you develop the right design for your individual needs.
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