What Is Singeing Process Of Fabric

Singeing

The burning off of protruding fibers end from the surface of the fabric.

Objectives

• Surface hairs help to entrap air in the fabric when fabric is immersed in water it takes time to absorb water in it since it must to dislocate the air. Singeing therefore helps to increase fabric wettability.

• It makes a smooth surface for printing.

• Focus on the woven structure of the fabric if that is considered desirable.

• To preclude a frosty appearance after dyeing.

• It reduces the tendency of blended Fabrics to form pills.

Singeing Process

• It produce a smooth surface of fabrics of staple fibers first the fabric surfaces are brushed lightly to protruding fiber ends.

• Then the fabric is passed over heated gas flames. The protruding

• The fabric leaves the singeing area; it enters in a desizing bath. It stops any singeing sparks that might impairment the cloth.

Precaution During process

• The fabric to be singed should be dry because wet fabric tends to burn more readily than the dry fabric.

• The loom state fabric should not contain any acid releasing salt that may release acid on heating and tender the loom state fabric.

• Spotty singeing may cause blotch on fabric when the fabric is finished.

• Singeing may cause hardening of the size that may lead to trouble in its removal.

• Wrong singeing may cause 75 % loss in tensile strength in length wise direction.

• Stoppage of the machines may cause bars on the fabrics.

• There may of thermal damage to temperature sensitive fabrics.

Appearance of fabric after singeing Machines for

Enzymes are complex organic, soluble biocatalysts; they are extracted by living organisms that catalyze chemical reaction in biological processes. Enzymes are particular in their action on a particular material. A small amount of enzyme is able to rot a huge amount of the material it acts upon. Enzymes are usually taken by the kind of material degraded in the reaction it catalyzes. α-Amylase is used as enzymes. They are hydrolyses and decrease the molecular weight of amylose and amylopectins molecules in starch. They attack on α linkage of amylases and amylopectins (starch). They yield glucose and maltose. They are easily cooled in water and can be washed out easily. For effective enzymatic desizing it is important to control pH, temperature, hardness of water, addition of electrolyte and selection of