Textile Knit Yarn Production System, common faults and their remedies

Knit Yarn Production System

In the present time, knit yarn occupied a big market, so every spinning mill has some tendency to produce knit yarn. So, to produce knit yarn, the following arrangements are necessary:

• Continuous electric supply source I.e. generator needed
• Working environment be comfortable I.e. humidity of plants is needed
• Quality control department should be well equipped.
• Schedule of machine maintenance must be maintained properly & carefully.
• Overall cleaning efficiency must be adequate.
• Relative humidity in different section given below:

  Blow room	50-55%
  Carding	50-55%
  Drawframe, combing, fly-frame or simples frame	50 -55%
  Ring frame	50-60%
  Finishing	60-65%

Major Yarn Faults and Remedies

Yarn faults	Remedies
Thick & thin places	Clean the sliver and yarn delivery passage
Slab	Undrafted sliver, to increase back zone draft, clean all covers of delivery passage.
Hairiness	To follow up ring traveler change schedule
Naps	Proper cleaning of Card frame
Color Contamination	During mixing, supervision must be strict. To set a contamination meter in conveyor lattice or finishing m/cs

Uniformity Ratio

Uniformity Ratio is defined as the ratio of 50% of span length to 2.5 % span length expressed as a percentage. This ratio is a measure of the length
variability of the cotton. The ratings for uniformity ratio are as follows:

• 50% —> Good
• 45% —> Average
• 43% —> Poor

 

Micronnaire and Maturity

The ratings of the micronnaire and maturity values given below can be used as a guideline

Fiber Strength

The tenacity of the cotton obtained at 3mm gauge length can be rated on the following basis: