Sunday, September 15, 2013

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Knit Fabric manufacturing process

Knitting:
Textile fabric is defined as two dimensional plane-like structure made of textile materials, having reasonable strength, elongation, flexibility, etc., used for different applications, particularly for apparels. Knitting is the second most popular technique of fabric or garment formation of inter-looping one or one set of yarns, and its share in fabric production is about 20%. In knitting continuous length of yarn is converted into vertical inter-meshed loops either by hand or by machine.
According to the direction of movement of yarn during loop formation, knitting can be classified as weft knitting and warp knitting. Out of the two types of knitting, weft knitting is widely used.

Weft Knitting: If the yarns run in the width or cross-wise direction with reference to the direction of fabric formation during knitting, then the process of knitting is called weft knitting.




Warp Knitting: In case the yarns run in the length direction, i.e. the direction of fabric formation during knitting, the process is called warp knitting.
 Accordingly, the structures are called weft-knitted fabric and warp-knitted fabric, respectively, and the machines employed for the purpose are called weft knitting machine and warp knitting machine.



Process Flow Chart for Knitting:

Yarn in package form

Place the yarn package in the creel

Feeding the yarn

Set the m/c as per design & GSM

Knitting

Withdraw the roll fabric and weighting

Roll marking

Inspection

Numbering 



Some terms of knit fabric:

  Single knits: Knit fabric produced using a single set of knitting needles. It is usually a thin lightweight fabric.

  Double-knit: Knit fabric produced on two sets of opposing needless. It is thicker and heavier than a single knit fabric.

  Technical Face: The outside of the tube of fabric produced by a circular knitting machine. This may or may not be the outside of a finished garment made from the fabric.

  Technical Back: The inside of the tube of fabric produced by a circular knitting machine. This may or may not be the inside of a finished garment made from the fabric.

   Knit Stitch: An interlocking series of loops used to construct a fabric. See the diagram above of the basic weft knit fabric.

  Tuck Stitch: A needle receives a new yarn without losing its old loop. A tuck loop always faces the technical back of the fabric.

   Welt, Miss, or Float Stitch: These terms describe the same formation. The stitch is created by not allowing the needle to raise high enough to receive a new yarn, causing the yarn to float behind the face stitches.

   Inlay Stitch: Combination of float and tuck stitches. In a 3x1 inlay, three needles float and one tucks. Commonly used in Fleece and French Terry fabrics.

   Jersey Fabric: The basic single knit construction (T- shirt fabric) with the appearance of tiny “V” is on the face of the fabric and wavy courses on the back of the fabric.

   Rib Fabric: This double-knit fabric draws some wales to the front and others to the back for a ridge effect. Ribs have a higher stretch and recovery than most knits and they are used for trim and body goods.

  Interlock Fabric: Two yarn feeds are required to create one course. The knitting in front and back gives interlock a smooth surface on each side of the fabric. Selected needles can be pulled out for poor boy looks.

  Lacoste Fabric: The original stitch configuration used in Lacoste shirts. The tucking pattern creates a tiny honeycomb look on the technical back of the fabric, which is used as the face for garments.



  Pique Fabric: The combination of knit and tuck stitches gives a small diamond's appearance to the face of the fabric. It is the most popular fabric used in collar/placket shirts

2 comments:

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