WEL COME TO MY

PRESENTIONFoysal Ahmed

Lets come to the topic

Woven Fabric

Dyeing.

Woven fabric is produced with interlacement of warp and weft yarn. The importance of woven fabrics increases constantly. Starting from traditional uses mainly in clothing applications.

Use:Woven fabrics today are key materials for structural, electronic, telecommunications, medical, aerospace and other technical application fields

Woven fabric dyeing process is different from knit fabric dyeing process. Jigger dyeing machine is used in woven dyeing.

FLOWCHART OF WOVEN FABRIC DYEING:GRAY FABRIC INSPECTIO

      ↓               STITCHING & BRUSHING

     ↓       SINGEING

  ↓       DSIZING

    ↓      SCOURING

    ↓        BLEACHING MERCERISING

     ↓    DYEING   ←         →     PRINTING

      ↓                                        ↓       FINISHING

DYEING:Dyeing is proper way to coloration of textile material (fiber, yarn, woven fabric, knitted fabric, non-woven fabric). Suitable dyestuff, dyeing machine and dyes chemical is required for achieving proper dyeing shade.

TYPES OF DYEING:

1. Fiber Dyeing

2. Yarn Dyeing

3. Fabric Dyeing 

4. Garment Dyeing

SINGEING:Singeing is the first step of dyeing. Singeing is important for a fabric to provide a smooth finish. Woven fabric goods usually contain protruding fibers from textile yarns. Singing process is used to remove those protruding fibres from the surface of the fabric.

DESIZING:Desizing is an important dyeing preparation step. During weaving sizing material is used to increase the strength of warp yarn. The sizing material is hydrophobic in nature. That’s why it must be removed before dying. Desizing is the process to remove the size material from the fiber.

BLEACHING :

Bleaching is a complex process. The most common bleaching agents include sodium chlorite, hydrogen peroxide, sulfur dioxide gas and sodium hypochlorite. All the natural fiber contains a natural color which is harmful for dyeing shade matching.

MERCERIZING:

Mercerization is used to increase appearance, luster

and dye ability of textile fiber. Mercerizing is a semi-

continuous or continuous chemical process used for

cotton and cotton/polyester goods

PRINTING :

Printing is the process to make colors on the textile materials with the presence of thickener to give sharp design. The thickener will be removed after the printing process to make softer handle.

FINISHING: 

Finishing is the last steps of dyeing. Actually dyeing

finishing is required for quality assurance of dyed

fabric. There are different types of finishing those

actually depends on buyer requirement.

There are two types of finishing:

I. Chemical finishing

ii. Mechanical finishing.

Chemical finish: Here finishing effect is brought out by means of chemical. Some examples are: 

I. Optical finishing

ii. Resin finishing

iii. Antimicrobial finishing

Mechanical Finishing: Here finishing effect is brought out by means of mechanical application some examples are:I. Calendaring

ii. Heat setting iii. Brushing

iv. Compacting

Methods in continuous dyeing process O Pad-steamO Wet-steamO thermo sol dyeingO TAK dyeingO space dyeingO Pad-steam dyeing long chain warp dyeing

etc.

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