types of we ft knitting machines presentation 1
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Lecture 13
Single Knit Machines (plain)
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Main Products
Single Jersey
Pique
Locast
Honey comb Pique fleece
Two thread fleece
Feed stripes
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Single Knit Machine 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
Cylinder and Dial
Two bed of needles
No sinker
Double side knitting
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Sub types
Interlock
Rib
Double jersey (interchangeable)
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Interlock
Highly flexible fabric
Can adopt any body shape
Used for under garments
Soft hand feel
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Rib
More strength
For grip purposes
Used at neck, arm opening, waist band
Always heavier than main fabric
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Stripes
Feed stripes
Engineered stripes
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Terry
To have towel effect
Velour fabric
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Loop Knitting
Fleece
Two thread fleece
Three thread fleece
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Jacquard
Mostly double knit machines
Electronic
Mechanical
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Lecture 14
Single Knitting Machines
Single jersey
Fleece
Terry
Stripes
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Jersey Knitting
Jersey Fabric
The consistent interlooping of yarns in the jerseystitch to produces a fabric with a smooth, flat face,and a more textured, but uniform back. Jerseyfabrics may be produced on either circular or flat
weft knitting machines.
Jersey Stitch A basic stitch used in weft knitting, in which each
loop formed in the knit is identical. The jerseystitch is also called the plain, felt, or stockinetstitch.
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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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Lecture 15
Fleece Fabric
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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Fleece ---
A fabric knitted with two types of yarn. Fine
yarn is on front side and course yarn on backside. 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 Fleece
Two thread fleece
Three Thread Fleece
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Two thread Fleece
Very rare
Was popular when three thread fleece werenot 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 courseyarn difficult to use
Long loop is difficult
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Cam Arrangement
On Fleece fabric.doc three needle track
machine:
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CHARACTERISTICS OF TWO
THEAD FLEECE Light to medium weight
Double impact on front side, particularly incase of different fibers
No good brushing possible due to short
length of loop
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Three 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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Yarn
C/PC
PC/C
30/16, 22/12/ 20/10
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Fiber 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
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
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Main characteristics of Three
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 remedies
Uneven loop – control yarn supply
Loop stretch– control cam tension
Needle line on front side
Wales thickness variation on front side due tofluff 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 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
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Loop knits
Terry fabric to knitted terry towel