care to be taken while knitted yarn manufacturing

8/9/2019 Care to be taken while Knitted Yarn Manufacturing.

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CARE TO BE TAKENWHILE KNITTED YARN

MANUFACTURING


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Advantages of Knitting a) Capital investment for starting a new knitting unit is smaller than weaving

unit.

b) There is no requirement of preparatory for knitting

c) The knitting productivity is high

d) The execution of an order in knitting is easy and in less time.

e) The setting up of a knitting machine is faster than a loom

f) The knitted fabrics are comfortable to wear

g) generally requires no ironing

h) Comfortable as swim wear, sports wear, during traveling.

i) The feel of knitted fabric is soft.

and so on.,

And, apart from the above there are many advantages in manufacturing

knitted fabrics.



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Knitters Expect the following output

Better working of knitting machine for good

production

Better fabric appearance Better elasticity of the fabric

Soft feeling of the fabric.



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Better working of knitting

machine for good production



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i) The yarn should not have more knots

(In case of knotted yarn.)

a) More breakages at cone winding

b) More half cops working at winding at a

time.

c) Less cop content.

d) Less cone weight.



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ii) The yarn should not have moreslubs

a) The optimum process parameters should bemaintained.

b) Proper preventive maintenance is to be

undertaken.c) Raw material selection is to be taken care

of.



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iii) The yarn should have good RKM. (Index

for

Single yarn strength) a) Good raw material parameters like length and

strength to be chosen.

b) Optimum TM to be given

c) There should not be any weak places in the

yarn

d) There should not be any thin places in the

yarn. e) There should not be low twist places in the

yarn.



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iv) The yarn should not have

more fluff a) Proper house keeping to be maintained

at all stages especially winding and

spinning. b) Proper Humidity in the winding

department.

c) Immediate covering of cones after

conditioning.

d) Proper packing methods.



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v) The yarn should not have

more cut ends a) Proper material handling should be at

winding.

b) Proper loading and unloading methods



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vi) The yarn should be free

from big knots a) Knotter maintenance should be good

b) Operators must be educated to use

good knotter and method of using knotter.



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vii) The yarn should be free from wildyarn, hard waste, or hand waste

a) The operators must be educatedregarding wild yarn

b) Proper maintenance of Auto coners

c) Cone ribboning must be corrected.



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viii) The yarn should be free from loose

knots or loose splicing

a) Operators must be educated regardingloose knots

b) There should be continuous monitoring

on lose splicing.



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ix) The cones must be free from tail

end missing a) Supervision must be perfect at winding stage

b) Winders must be trained properly, and they

must understand the use of tail end.

c) Method labeling of the cones must be proper.

d) Cone checking must be proper before

packing.



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x) There should not be any cone

tip damages a) The cones must be strong enough.

b) To check the cones before purchasing.

c) Proper handling methods before andafter conditioning of cones.

d) Segregation and Usage of good cones

in winding.

e) Suitable cradle pressure in winding.



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xi) There should not be any ball formation at

guides, slub catcher on knitting machine

a) There should not be more kitties in the yarn.

b) There should not be more hairiness in the

yarn

c) There should be optimum TM ( fabric feel

must be good as well as hairiness must be less

and strength should not drop.)

d) Yarn passage at spinning , winding andknitting must be free from rough surface.



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xii) There should not be any needle

breakages, and suitable needles to be used.(Of course, it may be a knitter's care)

a) The yarn must be free of big knots,

b) The yarn must be free from big slubs,

c) The yarn should have low hair count,

etc.



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xiii) The yarn should have acceptable

hairiness and imperfections and faults.

a) Optimum TM in yarn

b) Optimum length of fiber

c) Optimum fineness of fiber d) Optimum process parameters



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Fabric Appearance



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i) There should not be any holes in the

fabric a) The holes in the fabric is created by needlebreakages in knitting machine

b) Mal functioning of stop motion settings in

knitting machine c) More thick places in the fabric

d) More slubs in the fabrics.

e) More knots in the fabrics

f) Improper splicing in the yarn.

g) High count variation in the yarn.

h) Count mix up in the yarn.



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ii) There should not be any barre'ness

in the fabric a) Proper selection of raw material

b) Optimum range of micronaire or fiber

fineness.

c) Optimum range of color grade.

d) Low Count CV% in the yarn.

e) To process Short lots which can be two bins

capacity. f) Using of Blendomat or Unifloc like machies in

Blow room.



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v) The fabric should have better

evenness.

a) Proper even tension between feeders b) Proper U and Imperfections



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vi) The yarn should have lower

imperfections

a) Proper process parameters

b) Proper selection of raw material



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vii) The fabric should have even dye

pick up.

a) Optimum range of micronaire.

b) Should not use low micronaire c) Proper maturity Index.



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viii) There should not be any white

neps visible after dyeing

To take maturity of the cotton under

consideration during selection of the cotton.



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Better elasticity Better elongation

Better strength Better TPI



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Soft feeling of cloth

Optimum TM Optimum fineness in the raw material


care to be taken while knitted yarn manufacturing

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