Question 55 (Textile Engineering & Fibre Science)
Consider the following assertion [a] and reason [r] and choose the correct alternative from amongst A, B, C and D.
[a] Cross-laid needlepunched nonwoven fabrics demonstrate higher tensile strength in machine direction.
[r] In cross-laid nonwoven fabrics, the fibres are randomly oriented.
| (A) | [a] is right and [r] is wrong |
| (B) | [a] is right and [r] is right |
| (C) | [a] is wrong and [r] is wrong |
| (D) | [a] is wrong and [r] is right |
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Frequently Asked Questions | FAQs
What is cross laid web?
Cross-laid web refers to a type of nonwoven fabric that is formed by laying fibers or filaments in a crosswise or diagonal pattern, and then bonding them together using various methods such as heat, pressure, or adhesive. This results in a fabric that has a distinct crisscross pattern, with fibers running in both machine (lengthwise) and cross-machine (widthwise) directions.
Cross-laid webs are typically made from a variety of materials, including synthetic fibers such as polyester, polypropylene, or nylon, as well as natural fibers like cotton or cellulose. The cross-laid arrangement of fibers provides the fabric with strength, stability, and dimensional stability, making it suitable for a wide range of applications.
Cross-laid webs are commonly used in industries such as automotive, filtration, geotextiles, hygiene products, and wipes, among others. They can be engineered to have specific properties such as high tensile strength, softness, breathability, or liquid absorption, depending on the intended end-use. The cross-laid web manufacturing process allows for flexibility in design and customization, making it a versatile option for various applications.