Textile in Building technology & road construction

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Physical Structure of Cotton

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Physical structure Every cotton fibre consist of different Layers, Cuticle, Primary wall, Secondary wall and Lumen.Describe every layers are given below- Cuticle: The cuticle is the skin of cotton or out side of layer in cotton fiber. It is contains some cellulose but accompanied by fat and waxes. The waxy component of the cuticle enables it to adhere tenaciously to the primary wall of the fiber. Primary wall: The primary cell wall composed of criss-cross fibrils of cellulose and containing some pectins . It is the beneath of the cuticle. The cellulose in Primary cell walls has lower molecular weight with the DP between 2000-6000. Secondary wall: It is consist of the bulk of the cellulosic   component , which lies between the primary wall ans the lumen of the fiber. The secondary wall of a matured fiber is nearly 100% cellulose.The molecular weight distribution is uniform  and DP is about 1400 .It is composed two layers. It is thickness about 100 nm . The fibrils of th...
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Study on gearing diagram of a Draw frame Machine.

      YARN MANUFACTURING   TECHNOLOGY LAB-2 Experiment:1 EXP. NAME: Study on gearing diagram of a Drawframe Machine. Introduction /Theory: Drawframe  is a machine for combining and drawing slivers of a textile fiber (as of hemp for rope manufacture or cotton for spinning). Drawing  is the operation by which slivers are blended, doubled and leveled. In short staple spinning the term is only applied to the process at a It is a process of yarn manufacturing in which the sliver is elongated when passes through pairs of rollers, each pair moving faster than the previous one.This permits combination of several slivers. These slivers are drawn and elongated to straighten and create greater uniformity.There are two types of draw frame 1.     Draw frame -1/Pre-comb drawing/Breaker draw frame 2.     Draw frame -2/Post-comb drawing/Finisher draw frame Objectives of Draw Frame: 1. To straighten the fibre...
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Some Important Properties

             Some important properties ** Find structure and appearance: The surface structure of a fiber is most important in that it control the behavior of the fiber in the yarn and fabric. Rough surface of fiber enable individual fibers to grip one another when twisted together as a yarn. But it collects dust from the atmosphere. E.G.: Cotton, wool. The smooth surface of fiber affects the lustrous appearance of the fabric. It may not cling to dust as easily as rough surface. E.G.: Nylon, silk. **Strength: Strength of any material is determined by breaking strength, which expressed as force per unit cross sectional area with this term, we may describe the ability of a bundle of fiber or a yarn, to resist breakage under tension. It case of single fiber, strength, is described as tenacity. **Elongation: When a fiber is subjected to a force .It will stretch to a certain degree. The stretching is described as elongation or extension. ...
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