Pre-Treatment means any treatment, which is done before actual (dyeing and printing) process.
Natural fibers and synthetic fibers contain primary impurities that are
contained naturally, and secondary impurities that are added during
spinning , knitting and weaving processes.Textile pretreatment is the
series of cleaning operations.All impurities which causes adverse effect
during dyeing and printing is removed in pretreatment process.
Pretreatment processes include desizing, scouring, and bleaching which make subsequent dyeing and softening processes easy. Uneven desizing, scouring, and bleaching in the pretreatment processes might cause drastic deterioration in the qualities of processsed products, such as uneven dyeing and decrease in fastness.
Pretreatment processes include desizing, scouring, and bleaching which make subsequent dyeing and softening processes easy. Uneven desizing, scouring, and bleaching in the pretreatment processes might cause drastic deterioration in the qualities of processsed products, such as uneven dyeing and decrease in fastness.
Objects Of Pre-treatment
- High and even hydrophilicity / rewettability
- Good desizing effect
- High degree of whiteness
- Removal of seed husks
- Removal of foreign substances from the fiber
- Lowest possible fiber damage
- High color yield
- Neutral pH
- Levelness of the effects
- To remove dust and other impurities
Pretreatment is dependent on
- Fibres (natural or synthetic materials)
- Structure / Makeup / End use (Woven goods, knit goods, yarn ….)
- Machine (Continuous, Discontinuous, Semi-continuous)
- Chemicals (Wetting-/Washing agents, Complexing agents ….)
- Pretreatment processes (Desizing, Scouring, Bleaching ….)
No comments:
Post a Comment