Weft Knitting .1

Badr university
App. Arts
Textile Engineering department
Knitting Technology
First course
B y: Dr. Eng. Nour afify
Course Time Plan
Topic Week
Industrial and historical Introduction to knitting technology 1
Knitting fabrics classifications and comparison between knitting 2
fabric properties with other types of fabrics
Knitting definitions 3
Knitting elements 4
Stitch formation 5
Knitting machines classification and functions 6
Mid-Term Exam 7
Parts of Circular Knitting Machine and Their Function 8
Weft knitting structures and different types of notations 9
Four of the primary knitting Base structures(single jersey) 10
Rib and interlock structures 11
Weft knitting fabric defects and faults 12
Quality control of weft knitting fabrics and remedies of defects 13
Revision 14
Textile fabrics
 There are three principal methods of
mechanically manipulating yarn into textile
 fabrics: interweaving ( Interlacing) , intertwining
and interlooping ( Intermeshing).
 All three methods have evolved from hand-
manipulated techniques through their
application on primitive frames into
sophisticated manufacturing operations on
automated machinery.
Types of fabric
 There are four types of fabric,
 1-Knitted fabric.
 2- Woven fabric.
 3- Non-woven fabric.
 4- Braid fabric.
CLASSIFICATION OF TEXTILES
Comparison Between Weaving and Knitting
 Weaving:
 Process of fabric manufacturing in which fabric is
prepared by the interlacement of warp and weft yarns.
Knitting:
A process of fabric manufacturing in which fabric is
prepared by the inter looping of yarn.
Woven fabrics
 The best known fabrics are created in the weaving
process. At least two systems of threads are
interwoven here perpendicularly. Weft threads are
being pulled crosswise through lengthwise taut, tear
durable warp threads
Knitted fabrics
 Popularity of knits rises because of their wearing comfort and
ease of production. They are made in knitting process where
multiple loops of yarn are created and joined with each other.
Knitted fabric consists of horizontal, parallel courses and
vertical wales.
Non-woven fabrics
 The oldest method of creating materials is bonding /
splicing the fibers togheter. The process of
manufacturing felt fabrics can be a good example –
omparison between weaving and knitting production phases
Flow Chart between Weaving and Knitting
Weaving Knitting
Yarn in package form
↓
Yarn Place the yarn package in the creel
↓ ↓
Warping Feeding the yarn
↓ ↓
Sizing Set the m/c as per design & GSM
↓ ↓
Drawing Knitting
↓ ↓
Looming Withdraw the roll fabric and weighting
↓ ↓
Inspection and Grading Roll marking
↓ ↓
Measuring Inspection
↓ ↓
Folding Numbering
↓
Fabric Go down
Difference Between Knit Fabric and Woven Fabric
SL
No.
Knit Fabric Woven Fabric
1 Produced by using one set of yarn. It is produced by using two sets of yarn.
2 It has higher elastic properties. Elastic properties not more than knit fabric.
It needs less labor cost during manufacturing.

: knit fabric
Higher labor cost than
3 manufacturing.
4 It is comfortable to put on. It is not more comfortable than knit fabric.

5 It has high extensibility properties. It has lower extensibility characteristics.
6 Knit fabric has higher recovery characteristics. Woven fabric has lower recovery properties.
7 It has no dimensional stability. Woven fabric has dimensional stability.

In case of woven fabric, finishing is not
Finishing is advantageous in knit fabric.
8 advantageous.
It is easy to sew on and feed through a sewing
It requires stretch stiches, like zig zags.
9 machine.
10 Wrinkle resistant. Hold a crease well.
Requires seam finishing, like serging, to prevent
No seam finish is required.
11 ravel.
12 Edges curl and some knits run. Edges are prone to ravel.
13 Cool and breathable. Thick and wind resistant.
Most stretch is always on the bias (diagonal
Most stretch is either in the cross grain or the bias.
14 stretch).
15 Mold and fit the contours of the body better. Look good with pleats and sharp corners.
What is Knit Fabric?
 ?
 Knit fabrics have produced by using one set
of yarn by interloping. The whole process of
knit fabric manufacturing is termed
as knitting. It is done in knitting factory by
using circular knitting machine or flat
knitting machine. T-shirt, Polo shirt, inner
wear or leggings are the example of knit
fabric.

Knitting
Knitting is a method by which yarn is manipulated to create
a textile or fabric for use in many types of garments.
 Knitting creates multiple loops of yarn, called stitches, in a line or tube.
Knitting has multiple active stitches on the needle at one time. Knitted
fabric consists of a number of consecutive rows of intermeshing of
loops.
 As each row progresses, a newly created loop is pulled through one or
more loops from the prior row, placed on the gaining needle, and the
loops from the prior row are then pulled off the other needle.
 Knitting may be done by hand or by using a machine.
 Different types of yarns (fibre type, texture, and twist), needle sizes,
and stitch types may be used to achieve knitted fabrics with different
properties (color, texture, weight, heat retention, look, water
resistance, and/or integrity).
Hand Made Knitting
Knitting Types (Classification )
 There are, in principle,

two broad classes of
knitting processes
namely
 WEFT KNITTING and
WARP KNITTING
Knitting Classification

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It needs less labor cost during manufacturing.

4 It is comfortable to put on. It is not more comfortable than knit fabric.

7 It has no dimensional stability. Woven fabric has dimensional stability.

 There are, in principle,

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