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Process parameter of polyester fibres and polyester blends

                  USEFUL TIPS FOR SPINNERS
Fibre property of polyester fibre
Cut length
Denier
Fibre strength
Moisture regain
Specific gravity
Electrostatic
Spin finish

How to identify the Reliance  polyester fibre through identity label
         Ex...D 4 A 50
                  D....represent merge number
                  4.... Staple length
                  A...  Denier
                 50...   Line of manufacture
      ( 15,25)..Hajeera
       (60,50,75)...Orissa
       A..1.2 d
       F...1.4 d
       J...0.8 md
       D..1.0 d
The level of spin finish for polyester fibre varies from0.1--0.2
Nominal finish is .005%
Coarser fibre and p/v blends with higher speed needs more spin finish

BLOW ROOM
Fine tuning of blowroom machines to improve the following
1)cleaning efficiency
2)waste %
3)lint loss in waste
4)reduction in NEP generation

CARDING
Good carding is always essential for good quality yarn..

Objects of carding
1)fibre in dualisation
2)To remove neps,tiny lumps.fused fibres
3)To blend fibres
4)To delivery of continuous even sliver

On an average fibre goes around the cylinder 4 to 8 times before transferred to doffer

The wire angle is great importance for man made fibre
Usually coarser fibre greater angle 80 degree vice versa
70 degree is recommended for higher and finer fibre
Finer the fibre higher the PPSI.
   Licker- in with 1.2--1.4 recommended for man made fibre
The difference of the wire angle of cylinder and doffer is kept around 10- 15 degree.for better transfer coefficient..
   Ratio of surface speed of cylinder and licker-in is kept around 2.5-3.0 to avoid loading.
    

Neps/gram for polyester is 1 for viscose -2

More about  Carding.. Drawing..speed frame...Ringframe and Latest Autoconers 
Also quality analysis at every stage ....quick reference for spinner to get best premium yarn

           More to come....still to be continued
  Suggestion and comments are appreciated
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           Contents collected and posted by THIYAGARAJAN
             rajshasaga@gmail.com.... Mobile 9994900396
             Comments can be posted in my blog

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