In a very general way, a fiber is defined as any product capable of being woven or otherwise made into a fabric. It may be thought of as the smallest visible unit of textile production. Fibers may be agricultural products (such as cotton or wool) or units (such as nylon or polyester) manufactured in a chemical plant. Fibers than serve as the raw material in the next stage of textile manufacturing.
Top rollers are held strictly parallel to and in perfect alignment with bottom rollers.//The bottom rollers of speed frame exercise immense influence on the quality of roving.//The flyer is a special component of the roving frame that helps to insert twist in the roving. The flyer speeds employed normally range from about 1000 to 1400 rpm. The flyers’ special shape offers less air resistance, preventing roving breakages.
A weave in which there are 2 ends and 2 picks in a repeat is called a plain weave. It has the smallest repeat 2 x2. Classification of plain weave: Approximately square cloth, Warp face cloth, Weft face twill, Balanced cloth, Unbalanced cloth.
The most obvious way to measure the number of twists per unit length of yarn is simply to untwist a known length of the yarn and check visually to see whether the twist has been completely removed.
The process of drawing the warp yarn through the eye of heald frames according to design is called drafting, and the plan which indicates how drafting needs to be done is called drafting plan. It also denotes the number of heald shaft required for a given weave repeat
Zigzag twill are those in which the direction of twill is frequently reversed at suitable intervals either across the width or along the length. Herringbone twill are those in which the direction of twill is frequently reversed at suitable intervals either across the width or along the length but not as zig-zag twill and weft yarns floating condition is reversed of the previous yarn.
Diamond design is constructed on the principle of zig-zag twill.Pointed draft is used to make diamond design.Diaper design is constructed on the principle of herringbone twill.Straight or broken draft is used to make diamond design.
Classification of twill weave: S twill, Z twill, Warp way twill, Weft way twill, Simple twill, expanded twill, Multiple Twill. Derivarives of twill: Zig-zag, Harringbone, Diamond,Diaper, Broken, Rearranged,Shaded, Steped, Elongated, Combined and Curved twill.
The order of interlacement of warp and weft threads at right angles is known as structure of woven fabrics. The interlooping system of yarns is known as structure for knit fabrics. Classification of woven fabric structure: Simple structure and Compound Structure.Methods of fabric representation:❶Warp overlap in which warp is above weft and ❷Weft overlap in which weft is above warp
Yarn Count Conversion
Conversion from direct to direct system
Conversion from indirect to indirect system
Conversion from direct to indirect system
Conversion from indirect to direct system