Introduction : Americos Amylase 345 is a desizing agent based on bacterial alpha amylase. It is a mixture of highly concentrated alpha-amylase, wetting agent and lubricant to convert most of the sizes viz. starch, starch derivatives, synthetic sizes and their blends into water soluble products. Specifically it can be used for the following sizing materials and their combinations:
Advantages:- Starch
- Starch / Polyvinyl alcohol
- Starch / Polyvinyl alcohol / Carboxyl Methyl cellulase (CMC)
- Starch / Polyvinyl alcohol / Acrylates
Americos Amylase 345 has three different types of actions. The built-in wetting agent ensures proper penetration of enzyme in the textile material. The enzyme then converts the starch sizes in to soluble dextrin products, which can be easily removed in the subsequent washings. Moreover, the in-built lubricant reduces fiber to fiber and fiber to metal friction. This unique combination prevents the formation of unwanted creases, streaks, lines and crack marks during desizing process.
Physical PropertyAppearance | Viscous liquid |
Chemical character | Blend of amylase enzyme and non-ionic surfactants |
Ionic nature | Non-ionic |
pH (on 1% solution) | 5.5 – 6.5 |
Application pH | 6 - 7 |
Application temperature | 30 - 60°C |
StabilityHard water | Good, Ca2+ and Mg2+ ions increase the efficacy of the enzyme |
Acids | Good from pH 5 to 7 |
Alkalis | Stable in alkaline region from pH 7 to 9 |
Metal ions | Iron and copper ions are poisonous for enzymes |
CompatibilityNon-ionic surfactant | Generally very good |
Anionic surfactant | Selective, some reduce the efficacy of the enzyme |
Solvent based surfactant | Selective, some reduce the efficacy of the enzyme |
Organic sequestrates | Generally good |
Reducing / oxidizing agent | Reduce the efficacy of enzyme |
Application Methods Americos Amylase 345 can be applied by any one of the following techniques.
a) Exhaust application (jigger, soft-flow m/c and winch)Americos Amylase 345 | 1 - 2 ml/l |
Temperature | 30-60°C |
pH | 6 -7 |
Time | 30 - 60 min |
After the treatment, drain the liquor; give one hot wash and then one cold wash. Alkaline washing with soda ash improves the removal efficiency of degraded sizing material.
b) Exhaust application (wash-wheel)Americos Amylase 345 | 1% (owg) |
Temperature | 30-60°C |
pH | 6 -7 |
Time | 30 - 60 min |
First, raise the temperature of bath to 30 - 60oC. The machine should run for a minute to ensure proper mixing of chemicals. Adjust pH 6 - 7.
Thereafter, garment should be loaded. The desizing time can be varied from 30 - 60 min depending upon the type of fabric and chemical dosage.
3) Semi-continuous application (pad-batch process)Americos Amylase 345 | 3 - 5 ml/l |
pH | 6 -7 |