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knitted fabric Manufacturing Process

Date post: 17-May-2015
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Page 1: knitted fabric Manufacturing  Process
Page 2: knitted fabric Manufacturing  Process
Page 3: knitted fabric Manufacturing  Process

Main Products Main Products

Single Jersey Pique Locast Honey comb Pique fleece Two thread fleece Feed stripes

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Single Knit Machine Single Knit Machine Working Working Single bed of needle Only cylinders Needles and sinkers High speed Wider width Most common Easy to handle

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Double Knit Machines Double Knit Machines

Cylinder and Dial Two bed of needles No sinker Double side knitting

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Sub types Sub types

Interlock Rib Double jersey (interchangeable)

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Interlock Interlock

Highly flexible fabric Can adopt any body shape Used for under garments Soft hand feel

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RibRib

More strength For grip purposes Used at neck, arm opening, waist band Always heavier than main fabric

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StripesStripes

Feed stripes Engineered stripes

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TerryTerry

To have towel effect Velour fabric

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Loop Knitting Loop Knitting

Fleece Two thread fleece Three thread fleece

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Jacquard Jacquard

Mostly double knit machines Electronic Mechanical

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Single Knitting Machines Single jersey Fleece Terry Stripes

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Jersey Knitting Jersey Knitting

Jersey FabricJersey Fabric The consistent interlooping of yarns in the jersey

stitch to produces a fabric with a smooth, flat face, and a more textured, but uniform back. Jersey fabrics may be produced on either circular or flat weft knitting machines.

Jersey StitchJersey Stitch A basic stitch used in weft knitting, in which each

loop formed in the knit is identical. The jersey stitch is also called the plain, felt, or stockinet stitch.

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Single Jersey 30"/E22 Single Jersey 30"/E22

Yarn: Cotton 34/1 Nm

Fabric weight: 150 g/m2

Efficiency: 85%

Speed: up to 50 rpm

Production: 204 m/h - 63.6 kg/h

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Fleece Fabric Fleece Fabric

End Use :End Use : A fabric made by sheep wool, soft warm A fabric soft , warm bulky Generally used to: Protection from cold Sweat absorption (sweat shirt) Baby clothes

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FleeceFleece --- ---

A fabric knitted with two types of yarn. Fine yarn is on front side and course yarn on back side. In most of cases fine yarn is 100% cotton while course yarn is P/C 50:50

Normal combination and fiber ratio: 30/16, 20/10, 26/12 etc PC/C, C/PC

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Types of FleeceTypes of Fleece

Two thread fleece

Three Thread Fleece

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Two thread FleeceTwo thread Fleece

Very rare Was popular when three thread fleece were

not common Generally not liked due to impassion of

course yarn on front side Low quality product

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Made on single jersey machines Maximum medium weight, since very course

yarn difficult to use Long loop is difficult

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Cam Arrangement Cam Arrangement

On Fleece fabric.doc three needle track machine:

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CHARACTERISTICS OF TWO THEAD CHARACTERISTICS OF TWO THEAD FLEECEFLEECE

Light to medium weight Double impact on front side, particularly in

case of different fibers No good brushing possible due to short

length of loop

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Three Thread FleeceThree Thread Fleece

Made on fleece machines

High grammage is possible( 500 GSM) High brushing due to long loop on back side Maximum course yarn is possible ( up to 10 count)

on back side Very common in use Fleece machine guage is 16 or 18

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YarnYarn

C/PC PC/C

30/16, 22/12/ 20/10

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Fiber PercentageFiber Percentage

Calculation Method

Example: Front yarn 30s 100% cotton Back yarn 16 s 50:50 P/C Consumption ratio

Front Two kgs Back one kg

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Total consumption three kgs Total consumption three kgs Calculation: Calculation: front yarn 2 kgs 100 % cotton Back yarn 1 kg ( ½ Kg polyester and ½ kg cotton Total Cotton consumed 2 + 0.5 =2.5 Kgs Total polyester consumed ½ kg Ratio: cotton= 2.5/3*100= 83.33% Polyester= 0.53*100=16.66% Such ratio is normally called 80:20 Fleece

Page 32: knitted fabric Manufacturing  Process

Main characteristics of Main characteristics of ThreeThree Highly absorbent High weight is possible Can use entirely different yarn on both

sides( even dyed yarn) Pattern is possible ( diagonal stripes etc) Very common in use

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Fleece problems and their Fleece problems and their remedies remedies Uneven loop – control yarn supply Loop stretch– control cam tension Needle line on front side Wales thickness variation on front side due to

fluff contamination between the needles, needs regular cleaning, more cleaning is required due to course yarn

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Poor brushing–due to high TPI yarn– use low TPI

Dyeing variation due to different percentage of yarn… calculate exact % by using Skelton test

Steak problem after dyeing due to heavy weight fabric--- use anti creasing agents in dyeing

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High shrinkage --- use compactor or tumble dryers

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Other types of fleeceOther types of fleece

Sherpa fleece --- brushed and washed to get balls

Polar fleece ---- loops on both sides also brushed on both side

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Double Face loop Knitting Double Face loop Knitting

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Loop knitsLoop knits

Terry fabric to knitted terry towel


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