Combing is a process which is meant for upgrading the cotton raw material so that the following yarn
properties will improve compared to the normal carded yarn. U% of yarn tenacity gms/tex trash in the yarn(or kitties in
the yarn) Lustre and visual appearance. The main parameters influencing combing are:
RAW MATERIAL:
- Fibre type
- Fibre fineness (Micronaire)
- Fibre length
- Uniformity of fibre length (CV)
- Fibre stiffness
- Moisture content
- Foreign material associated with the fibres
MATERIAL PREPARATION:
- Parallelization of the fibres in the sheet (batt)
- Batt thickness
- Batt evenness
- Orientation of the hooks
FACTORS ASSOCIATED WITH THE MACHINE:
- Condition of the machine
- Condition of the combs
- Speeds
- Operational performance of the combs
- Type of sliver forming element (diagonal shift of the piecing)
- Accuracy of the settings
- Drafting arrangement
- Movement of the elements
- Weight of the elements
- Type of withdrawal of the combed web (either straight forward or oblique)
MACHINE SETTINGS:
- Feed distance
- Type of feed
- Detachment setting
- Point density of the combs
- Circular comb clothing (angles of teeth, density of teeth, etc)
- Depth of penetration of the top comb
- Piecing
- Draft
- Drafting arrangement settings
AMBIENT CONDITIONS:
- Room temperature
- Relative humidity in the room
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