Difference between Rib, interlock and plain

Comparison among plain single jersey, plain rib and plain interlock fabric:

points	Plain s/j fabric	Plain rib fabric	Plain interlock fabric
1.appearance	Face and back side are different	Face and back side are identical	Face and back side are same
2.visibility of Wales	Clearly visible on the face side	Face and back side are identical.	Wales of each side are exactly opposite to each other and locked together
3.extensibility	Widthwise extensibility is twice than lengthwise extensibility	Width and lengthwise extensibility is twice than single jersey	Elongation is same as single jersey
4.curling tendency	Curling occurs at the edges	No curling tendency	No curling tendency
5.thickness	Approximately  twice of yarn diameter	Approximately twice than single jersey	twice than single jersey
7.series of loops	One series of knitted loop for per course	Two series of loops	Two series of loops
8. Derivatives	Single lacoste ,Double lacoste.,Single pique,Polo pique/Double pique,Two thread fleece,Three thread fleece,French terry etc.	2×2 rib,Half cardigan or royal rib,Full cardigan or polka rib,Swiss double pique,French double pique	Single pique or cross tucks interlock,Jersey cord.Eight lock.

Comparison between RIB and INTERLOCK circular knitting machine:

RIB	Interlock
1.Rib has vertical cord appearance	1.it has the technical face of plain fabrics on both sides
2.one type of latch needle is used	2.two types of latch needle is used.
3.one feeder is used at yarn feeding	3.at least two feeders are used
4.relaxation is less	4.more relaxation
5.Dial and cylinder needles are opposite but placed in same sequence.	5. Dial and cylinder needles are opposite and alternatively placed
6.it is not so thick and heavy structure	6. it is so thick and heavy structure
More production rate	7. less production rate
8.used to produce tops of socks, cuffs ,sleeves ,bottom edges of sweaters ,knit hats, means hosiery	8.used to produce underwear, shirts, suits, trousers suits, sports wear, dress

Fabric inspection Faults and their causes

Defects	Causes
Holes	Bad needle, take down mechanism too tight, high tension on yarn, bad yarn needle too tight in their slots, dial height too low or too high, badly tied knots, improper stitch setting.
Drop stitches	Takedown mechanism too loose, defective needles, too loose yarn tension not sufficient, wrong needle timing set, needle tricks closed.
Vertical lines	Defective needle, dirt in needle slots, needle too loose or too tight in the tricks, needles not enough lubricated.
Soiled yarn	Contamination of cones due to miss handling, knot tying with dirty hand.
Rust mark	Rusty needle, rust in tricks.
Slub	Broken filaments being pushed back along the thread line excessive tails of knitter knot.
Loop distortion	Bad and bent needles, bent trick walls, uneven yarn tension, needle timing set wrong, yarn carriers set wrong.

Difference between weaving and knitting

Topics	Weaving	knitting
1.Definition	The fabric forming process by interlacement of warp threads.	The fabric forming process by intermeshing of loops.
2.Elasticity	Very less or no elasticity.	The fabric shows high amount of stretch and elasticity due to loop structure.
3.Dimentional stability	Good dimensional stability which causes less shrinkage.	Less dimensional stability
4.Durability	More durable	Less durable than woven Fabrics.
5.Moisture absorption	The fabric absorbs less moisture	The knitted fabrics absorb more moisture because of their loose construction.
6.Slacking and low sening	The fabric provides good stability due to intersecting of yarns at right angle.	It creates problem after wearing for along time.
7.Air permeability	Air is less permeable due to compact construction woven fabric.	Air permeability is more due to voluminous structure of knitted fabric.
8.Crease	woven fabrics are more inclined to crease .So ironing and iron retention  are better knitted fabric.	Knitted fabrics are more resistant to crease. So it requires no ironing.
9.Production cost	Production cost is more due to warp preparation and desizing process	Production cost is less due to modest manufacturing process.
10.Yarn	TPI of yarn is comparatively higher than knitting yarn.	TPI of yarn is comparatively lower than woven fabric.