VB-MAST side-extruder concept is the state-of the art solution to produce high quality dopedyed (solution dyed) yarn.

Dope dyed yarn spinning is year after year becoming a key factor to reduce the environmental impact of the package dyed and piece dyed processes. Producing colour yarn with VB-MAST technology eliminates all water pollution and discharge of harmful waste.

Highlights:

• VB-MAST is based on a dedicated design of dynamic mixer developed to allow a very uniform mixing of the white melt streamwith the coloured melt, without colour degradation.
• Accurate process control on pressure, temperature and mixer revolution speed allows to repeat the colour time after time. It is possible to adjust shade deviations inducted by variation in the raw material.
• Using dedicated side extruder to melt the master batch, the main extruder is never polluted.
• Melt injection unit is easy dismountable for fast cleaning.
• The colour melt dosing is performed by a metering pump for the most effective and precise dosing.

Wide experience

Since 1996 we successfully supply equipment for dope dyed spinning for POY, FDY, HOY, IDY. Our wide experience is at disposal of our Customer to enter in and develop this speciality business.

Colour uniformity

A dedicated design of dynamic mixer is developed to allow a very uniform mixing of the white melt stream with the coloured melt. The dynamic mixer can be installed as prolong of the main extruder screw or inserted in the polymer line.

Colour repeatability

Accurate process control on pressure, temperature and mixer revolution speed allows to repeat the colour time after time. It is possible to correct shade deviations inducted by variation in the raw material.

Fast colour change

Using dedicated side extruder to melt the master batch, the main extruder is never polluted. Melt injection unit is easy dismountable for fast cleaning. Mixing grooves in the dynamic mixer are shaped to avoid colour degradation.

Precision dosing

Using dedicated side extruder to melt the master batch, the colour melt dosing is performed by a metering pump for the most effective and precise dosing. In case of master batch dosing using a gravimetric unit system special installation of dosing unit are advised to minimize dosing errors due to vibrations.

Less degradation on master batch material

Parallel spinning design allows a complete pre-assembling and testing of all parts in our factory before shipment to assure a machine working faultless within few weeks from the delivery.