2011 ~ Wet Processing

Dyeing and General Idea of Dyenign

বৃহস্পতিবার, ১৬ জুন, ২০১১

Dyeing :Dyeing is a distribution process in which the dye or pigment is distributed at least two phases or phase systems i.e; the dye/pigment bath or solution and the textile material. Dyes / pigments are generally coloring materials for dyeing operation. There are various types of dyes and pigments for the coloration of Textiles.

General Idea about dyeing:

1. Textile Materials : Fiber, Yarns and Fabrics are the Textile raw materials for dyeing. These are the products which are dyed by a color or dye. So the first component for dyeing is the raw materials.

2. Dyes or Pigments: Dyes and pigments are one of the important object for dyeing purpose. Without it nothing can be colored and dyed. Because its the main source of color.

3. Chemicals and Auxiliaries : There are some chemicals need for dyeing operation. They are used for increasing strength, stability, performance, etc.

4. Utilities : Coloration can not be done by only with Materials and dyes, it needs some utilities too. These are the main producer of dyeing or coloring materials. Water, Gas, Electricity etc. are the main source of a production. So without the help of Utilities production cant be done.

5. Dyeing Machine : Without machine no operation can done.

6. Machine for After treatments: For better performance and better look machine of after treatments is used.

Enzymatic Desizing Process

রবিবার, ১৫ মে, ২০১১

Enzymatic Steeping
Enzyme is one kind of bio-catalyst. Its molecular is high but different from chemical catalyst. The action of enzyme controlled by temperature, concentration, time and pH of the solution

Enzymes are living organism.
Its is based on protein .
It's main function is formation of starch.
Soluble in water but insoluble in acid and alcohol.

Types of Enzyme :

Enzyme
SL	Animal	Vegetable
1	Viverel	SL	Malt-extract	SL	Bacterial
2	Novofermosal	1	Dastator	1	Rapidase
3	Degomma	2	Diastace	2	Biolase
4	Pancreatic	3	Malto stage	3	Bactolase
		4	Malto ferment

Malt Extract: Malt Extract Enzyme are obtained by extraction of freshly germinated barely..
Bacterial: The fermentation of Bacterial Enzyme is obtained from bacillus substituent which grows on rice and breaks down the starch into water soluble dextrose.

## Condition of desizing of different enzyme...

SL	Enzyme	Temp	PH	Required cons.
1	Malt- Extract	55-60	6-7.5	3-20 gm/l
2	Bacterial	60-70	5.5-7.5	0.1-1 gm/l
3	Animal	50-55	6.5-7.5	1-5 gm/l

Singeing And Desizing

Figure :Gas Singeing

Singeing : It is an operation carried out to remove lose fiber, hairy fiber, protruding fiber from the surface of the clot.

Types Of Singeing Maching

Plate Singeing Machine.
Roller Singeing Machine
Gas Singeing Machine.

Features of Gas Singeing Machine

Both side singeing,
Natural gas and compressed air
Gas burner width and thickness adjust
Two or more burner
Speed of the Machine
Water Bath

Caring should be taken at the time of Singening
Flame should be effected. Fabric should be dry, Fabric component should be clean, Power failure must be checked, Electromagnetic device should be checked, Speed should be the same.

Figure: De sizing Process

De-Sizing : De-sizing is the process by which the sizing materials are removed. This is the main function of a desizing process. There are different types of sizing materials are found. They are, Stretch, PVC, Polyester Blend sizing materials, CMC etc.

Classification of De-sizing method: