Finishing of 100% cotton woven fabric with water repellent finish.

The term finishing includes all the mechanical and chemical processes employed commercially to enhance the acceptability of the merchandise, except those procedures directly concerned with coloring. The objective of the varied finishing processes is to form fabric from the loom or knitting frame more acceptable to the buyer. The newly formed cloth is generally dirty, harsh, and unattractive, requiring considerable skill for conversion into a desirable product. Before treatment, the unfinished fabrics are mentioned as gray goods, or sometimes, within the case of silks, as greige goods.

Nature of Sample: 100% cotton woven fabric.
Apparatus Required: i) Beakers. ii) Glass Rod. iii) Pipette. iv) Measuring Cylinder. v) pH meter.        vi)Pot. vii) Electronic Balance

Process Sequence:

Recipe:
 water repellent finish=20 g/L
 Wetting Agent= 2 g/L

Temperature=  Normal Temperature

                  pH=

Carrying Temperature= 140°c

Time = 5 min

The function of the chemical:
water repellent finish: Waterproof Finishes -Allows no water to penetrate, but tend to be uncomfortable because they trap moisture next to the body. Water-repellent finishes to resist wetting.
 Wetting Agent: Used for reducing the surface tension of water.


Working Procedure:

1. Firstly we take the fabric sample and chemicals.
2. Then we measured the chemicals by digital balance.
3. Then we prepare a solution of chemicals.
4. After preparing the chemical solution we drop the sample and take time.
5. After some time we take a sample from the chemical solutions and prepared it for padding.
6. We padded the sample for five (5) times at a normal temperature.
7. After padding, we take samples and prepared the sample for carrying.
8. In the carrying machine, we dry the fabric sample for 5 min at 140°C.

Precaution:

1. We have to maintain laboratory precautions very carefully.
2. Every chemical we take should be taken accurately by pipette and should be taken very carefully.
3. We should be very careful during the time of working with a gas burner.
4. We should have to maintain the temperature accurately.