Wood fibre: composition, sources, processing and uses

Sources and types

Although trees are the principal source, many other plants supply fibres used in industry. Common non-wood fibres include:

• straw and cereal residues
• bamboo, a fast-growing woody grass
• cotton, valued for nearly pure cellulose
• hemp, used for strong textile and technical fibres
• sugar cane bagasse, a byproduct of sugar production

Processing and products

Wood and plant fibres are separated from bulk tissue by mechanical or chemical pulping, then refined, screened and often bleached depending on the intended use. The most familiar end product is paper, but wood fibres are also the basis for fibreboards, insulation, specialty textiles (through chemical regeneration of cellulose), and composite materials used in construction and transport.

Properties, uses and sustainability

Fibre length, wall thickness and lignin content largely determine applications: longer fibres from softwoods confer tear resistance in paper, while shorter hardwood fibres yield smoother surfaces. Because fibres are biodegradable and can be sourced from managed forests and agricultural residues, they feature prominently in circular-material strategies, though processing can involve energy and chemicals that require mitigation.

History and notable facts

Human use of plant fibres for writing, textiles and containers is ancient; papermaking developed in East Asia and later spread worldwide, transforming communication and industry. Today, innovations focus on improving yields, reducing chemical impacts, and expanding wood-fibre uses in bio-based products and engineered materials.