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Write a profile of a synthetic / manmade fabric under each of the following headings: - fibre production - properties - Leaving Cert Home Economics - Question 2(b) - 2015
Question 2(b)
Write a profile of a synthetic / manmade fabric under each of the following headings: - fibre production - properties. - fabric construction technique.
Worked Solution & Example Answer:Write a profile of a synthetic / manmade fabric under each of the following headings: - fibre production - properties - Leaving Cert Home Economics - Question 2(b) - 2015
Step 1
fibre production
Answer
Viscose (rayon fibre) is produced through a chemical process where cellulose becomes more soluble. This process involves shredding the cellulose into a fine powder, which is then treated with various chemicals to yield a viscose solution. After the chemical treatment, the viscose is extruded through a spinneret to create filament. The filaments are continuously spun to produce lengths of viscose fibre that are then cut into staple lengths or left in a long form, depending on the desired end product.
Nylon, another synthetic fibre, is manufactured through a polymerization process involving long-chain polymers. The polymer is dissolved in a solvent and then extruded into a spinning apparatus where it is cooled and solidified, resulting in long, continuous strands which can be cut to the desired length.
Step 2
properties
Answer
Viscose has several advantageous properties: it drapes well, is highly absorbent, and is comfortable against the skin. Viscose also may wrinkle easily and can be less durable over time. In contrast, Nylon possesses properties that make it exceptionally strong, lightweight, and resistant to wear and tear. Nylon is also resistant to mildew and has a smooth texture, making it comfortable to wear.
Step 3
fabric construction technique
Answer
The weaving technique is a common method for fabric construction where yarns are interlaced at right angles. In weaving, the yarn that runs vertically is known as the warp, while the yarn that runs horizontally is termed the weft. During the weaving process, the weft threads are passed over and under the warp threads, creating a tight fabric structure. This method can produce different fabric textures based on the weave pattern, such as plain, twill, or satin weaves. Additionally, knitting can also be employed where interlocking loops of threads create a flexible and stretchy fabric, ideal for garments.