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Fiber Drawing

Definition of Fiber Properties

Important fiber properties such as strength and shrinkage are created by drawing, and set by heat treatment.

Proven Components for Drawing and Heatsetting

  • Godets with actual draw forces up to 200kN and working lengths up to 2,000mm
  • Dip baths with hot water or emulsion with high temperature stability and contactless pre-drawing of PET fiber tows
  • Calendar with heat-setting rollers, with actual draw forces up to 200kN

SDD - A Multi-Stage, Compact Drawing System with Driven Godets 

In one-stage installations with production capacties of up to 60 t/day, this compact module from Trützschler can replace several drawing systems, thus reducing the total length of the fiber line by several meters. For the first time, drives are available, which perfectly fit between each other in the limited space behind the draw stand. The individual adjustment of speed and draw ratios between the single godets result in improved fiber quality of PP and PET fiber tows.

Fiber Crimping

Permanent Waves on a Large Scale 

Crimping is one of the most important phases in the production of staple fibers. Stuffer box crimping has opened new application fields and inspired the success of man-made staple fibers. The crimping process is very sensitive. It is based on uniform distribution of the incoming fiber tows. To achieve the desired deformation, the fibers are subject to very high loads. This results in a correspondingly high heat generation which must be controlled.

Features of the Trützschler Crimper 

  • Water-cooled crimper rollers with diameters ranging from 200 to 300 mm
  • Monobloc crimper rollers without shrink-fit outer shell
  • Stuffer box optionally with steam injection and extraction
  • Integrated control panel to adapt all crimp parameters

Heatsetting of Fibers

Efficient Low Energy Drying

Energy efficiency is a "hot issue" in drying technology, but not for Trützschler's plate belt and drum dryers. Thanks to perfect insulation, heat loss is reduced to a minimum. It is possible to choose from belt and drum dryers, depending on product and process. All dryers are available with several treatment zones, which are optimized in regard to energy savings and product quality.

Drying and heat Setting with Plate Belt dryers 

The plate belt dryer is the best solution when it comes to drying and heat setting of uncut staple fiber tows. Its excellent temperature and air flow distribution ensures extremely uniform drying and shrinking results over the entire working width. Any potential condensing spin finishes can easily be removed.

Drying with Drum Dryers 

The through-air principle, a suction draft developed on the drum surface, keeps the fiber tows on the drum; and at the same time flows through the web. High speeds are achieved even with a high number of fiber tows. The number of drums is not limited, thus even the highest moisture levels can be reliably dried.