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FP5

BIOFELT Informe resumido

Project ID: G1ST-CT-2002-50310
Financiado con arreglo a: FP5-GROWTH
País: Belgium

Dyeability of enzyme-treated felts

Untreated and protease treated felted yarn and prefelted area-measured material samples when dyed in competition show enhanced colour uptake of the enzyme treated samples; all protease treated samples dyed with different dyestuffs show a deeper colouration. Concerning the low-temperature dyeing it was elucidated at lab scale that dyeing at 60 °C led to uneven colouration. However, protease treated prefelted area-measured material dyed at 90 °C gave the same or even slightly better dyebath exhaustion that the untreated reference dyed at 98 °C. The processes were transferred to pilot scale showing that the results obtained on lab scale with felted samples cannot be transferred to unfelted samples at pilot scale; severe fiber damaging was observed. As a result it was concluded that for all scaling up, change of start material or machinery where the protease treatment is performed the parameter sets (temperature, time, buffer, kind of protease) have to be optimised separately

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Dominique GODIN
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