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textile fibers - Introduction to Textile fibers In this...

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Introduction to Textile fibers In this unit, we are going to explore a variety of fibers used in textile products, and to find out how they differ in their structure, and what are the properties of the specific fiber, and how they are formed and produced. First, we are going to find out the different categories of fibers, the structural levels of fiber, and the terms used for the description of the fiber properties; then we will deal with all the different fibers one by one and to find out how each fiber performs and why. Topic: Textile fiber classification, Structural description, and general properties . Objectives : To understand the structural components or structural levels of the fiber material. To understand the classification system of fibers and the different categories of fiber products. To understand the terminology of fiber property description Outlines : Fiber Structure Description 1. Polymer and macromolecule Fiber material is also described as polymer material. We all know that the fundamental structural elements of any substance is atoms and molecules. For example, water is a mass of water molecules H 2 O which is formed by two hydrogen atoms and one oxygen atom. Polymer is characterized by its large molecules formed with repeating smaller molecular groups or segments, called macromolecules . We can imagine in a way that the molecules of the fiber has a ‘similar shape’ as that of fiber - long and thin. There is a term used for the description of the polymer size - the degree of polymerization - which is the number of repeating units contained in a molecule. We will see some examples when we discuss specific fibers. 2. Fiber morphology - “the study of the size, shape, and structure of a material”. The structure level of fiber can be viewed depends on the means or the instrumentation applied. First we can see fiber with our eyes directly, the length, the size, the 3-d feature, and the color. Then we can use light microscope and
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