Enzyme treatment on cotton fabric

Theory: After scouring and bleaching the cellulosic goods (usually knit fabric) are treated with acetic acid for neutralization hen the fabric is treated with a suitable enzyme within a recommended condition (temp, time, p^H etc) for polishing the fabric surface by removing the short and immature fibre from the substrate. This process can be applied before or after dyeing (normally before dyeing ) operation.

Recipe:

Enzyme -4 g/l

CH₃COOH – 1 g/l

Wetting agent -1 g/l

Sequestering agent -1 g/l

Temp – 55°C

Time – 50 min

M: L -1:40

PH -4.5

Fabric weight -5 g

Enzyme killing:

Temperature - 80° C

Time -10 min

Function of the chemical required:

Wetting agent: It accelerates the wetability of material in solution thus helps to easy penetration of chemical into substrate. Usually it is used in scouring, bleaching & dyeing process. It is available in market in form of clear of yellowish liquid.

Sequestering agent: Sequestering agent is used to treating the hard water and removing the metallic in the solution.

Recipe calculation:

Enzyme,

For 1000cc water, enzyme required 4 gm

 1 “                 “           “               “        4/1000 “

  200 cc “        “           “               “       (4×200)/1000 “ = 0.8 gm

Similarity,

CH₃COOH = 0.2 g

Wetting agent = 0.2 g

Seq agent = 0.2 g

Water = 200cc

 curve:

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Shade attatchement:

cotton fabric

Conclusion: In enzyme treatment on cotton fabric, the temp and time are very important parameter properly. Otherwise bacteria will be killed before treatment.

       

Brazzoli dyeing machine