**Classification of Fibres**

Fibres are classified based on various characteristics such as their origin, chemical composition, and physical properties. Here, we will discuss the different classifications of fibres in detail:

**1. Natural Fibres:**
Natural fibres are derived from natural sources like plants, animals, and minerals. They can be further classified into the following categories:

- **Plant Fibres:** Plant fibres are obtained from various parts of plants such as seeds, stems, leaves, and fruits. Examples of plant fibres include cotton, jute, coir, and hemp.

- **Animal Fibres:** Animal fibres are obtained from animals such as sheep, goats, rabbits, and silkworms. Examples include wool, silk, cashmere, and mohair.

- **Mineral Fibres:** Mineral fibres are derived from minerals and rocks. Asbestos is an example of a mineral fibre.

**2. Synthetic Fibres:**
Synthetic fibres are man-made fibres that are produced through chemical processes. They can be further classified into the following categories:

- **Rayon:** Rayon is a semi-synthetic fibre made from cellulose obtained from wood pulp. It is soft, comfortable to wear, and has good moisture absorption properties.

- **Nylon:** Nylon is a synthetic fibre made from petroleum-based chemicals. It is strong, elastic, and resistant to abrasion, making it suitable for use in products such as stockings, ropes, and parachutes.

- **Polyester:** Polyester is a synthetic fibre made from petroleum-based chemicals. It is durable, wrinkle-resistant, and has good shape retention. Polyester is commonly used in clothing, upholstery, and carpets.

- **Acrylic:** Acrylic is a synthetic fibre that resembles wool. It is lightweight, soft, and warm. Acrylic fibres are often used in sweaters, blankets, and outdoor clothing.

- **Spandex:** Spandex, also known as Lycra or elastane, is a synthetic fibre known for its exceptional elasticity. It is commonly used in sportswear, swimwear, and undergarments.

**3. Blended Fibres:**
Blended fibres are a combination of natural and synthetic fibres. They are created to combine the desirable properties of both types of fibres. Examples of blended fibres include polycotton (a blend of polyester and cotton) and wool blend (a blend of wool and synthetic fibres).

**4. Regenerated Fibres:**
Regenerated fibres are produced by chemically treating natural materials to obtain a fibrous structure. They can be further classified into the following categories:

- **Viscose:** Viscose is a regenerated cellulose fibre derived from wood pulp or cotton linters. It is soft, breathable, and versatile.

- **Modal:** Modal is a type of viscose fibre made from beech trees. It is known for its softness, durability, and good moisture absorption.

In conclusion, fibres are classified based on their origin (natural or synthetic), chemical composition (cellulose-based or petroleum-based), and physical properties (strength, elasticity, absorbency). This classification helps us understand the characteristics and applications of different types of fibres in various industries.