HEAT SETTING

HEAT SETTING

Heat setting,purpose of heat setting,object of heat setting,type of heat setting,parameter of heat setting

The process of bringing the dimensional stability to synthetic fabric is known as Heat Setting"

PURPOSE

Fabrics of synthetic fibres and their blends have a tendency to shrink and to form Permanent crease and Wrinkles in boiling water and in hot air.

 Most of the treatment's for polyester ate carried out only at higher temperature above 1oo°C. However the polyester shrinks heavily therefore, it should be controlled.

The process of bringing dimensional stabilility in synthetic fibre fabrics is known as heat setting.

Most of the treatment's for polyester ate carried out only at   higher temperature above 1oo°C. However the polyester       shrinks heavily therefore, it should be controlled. The process of bringing dimensional stabilility in synthetic fibre fabrics is known as heat setting. OBJECTS 1 It gives Dimensional Stability to synthetic goods. 2. It gives Crease Resistance property. 3. It improves the Resistance to pilling 4 It improves some dyeing properties. TYPES OF HEAT SEITING Pre setting - Before all wet processing Intermediate- After bleaching and scouring Post setting -  After all wet processes. However, this type will give Dye Migration problem and Dye Sublirnation problem CONDITIONS FOR HEAT SETTING The method involves in subjecting the fabric at High C Temperature under control (180- 200°C) for a definite  time (s0-40 seconds ).This temperature does not come under normal processing conditions. The fabric is allowed to shrink during heat setting  The heat set fabric will not shrink in heat unlessoand until the temperature and time of heat setting is not crossed The process of heat setting is normally carried out on Pin stenters or in curing ovens PARAMETERS  1. Time of heat setting 2. Temperature of hear setting 3 Over feeding l 4 Tension of the fabric Tension during heat setting is also an important factor .It will disturb Diffusion and Fixation process