DT12: Textiles and Fibres
Natural fibres (cotton, wool, silk, linen), synthetic (polyester, nylon, acrylic, elastane), blended fabrics; woven, knitted and non-woven constructions; properties and applications.
Textiles and Fibres
Natural fibres (cotton, wool, silk, linen), synthetic (polyester, nylon, acrylic, elastane), blended fabrics; woven, knitted and non-woven constructions; properties and applications.
Key Fact: Natural fibres: cotton (breathable, absorbent, soft), wool (warm, elastic, fire-resistant), silk (strong, lustrous, drapes well), linen (cool, crisp, creases easily).
Key Fact: Synthetic fibres: polyester (durable, quick-dry, wrinkle-resistant), nylon (strong, abrasion-resistant), elastane/Lycra (extreme stretch and recovery).
Key Fact: Woven fabrics: warp and weft interlaced at 90 degrees - stable, strong, limited stretch. Plain weave, twill weave (denim), satin weave.
Key Fact: Knitted fabrics: interlocking loops - stretchy, comfortable, can ladder. Weft knit (t-shirts) vs warp knit (more stable, swimwear).
Key Fact: Blended fabrics: combine natural and synthetic - polycotton (breathability + durability), cotton-lycra (comfort + stretch). Blends optimise properties and reduce cost.
📋 Key Vocabulary and Concepts
For Textiles and Fibres, you must know:
- Natural fibre
- Synthetic fibre
- Staple fibre
- Filament
- Warp
- Weft
- Woven
- Knitted
- Non-woven
- Felt
- Polyester
- Nylon
- Elastane
- Cotton
- Wool
- Silk
- Linen
- Blend
- Poly-cotton
- Denier
- Thread count
❓ Practice Questions
Q1: Explain why polycotton is used for school shirts instead of 100% cotton or 100% polyester.
Q2: Compare woven and knitted fabric constructions, explaining why each suits different garments.
Q3: Discuss the environmental impact of synthetic fibres compared to natural fibres.
✅ Answers
- 100% cotton: comfortable but creases badly, shrinks. 100% polyester: durable and wrinkle-free but feels clammy, does not breathe. Polycotton (typically 65/35): retains cotton's breathability, gains polyester's durability and crease resistance, ideal for school uniforms.
- Woven: warp + weft at 90 degrees, stable, holds shape - suits structured garments (shirts, trousers). Knitted: interlocking loops, stretchy, comfortable - suits body-hugging garments (t-shirts, socks, sportswear).
- Synthetic: petrochemicals (non-renewable), microplastic shedding, non-biodegradable, but durable and recyclable. Natural: renewable, biodegradable, but cotton needs vast water and pesticides. Neither is perfectly sustainable - blended fabrics are hardest to recycle.
🎯 Exam Tips
- Know the difference between fibre (raw strand), yarn (spun fibres) and fabric (woven/knitted)
- Specify the fibre type - 'polyester' not just 'synthetic'
- Blend rationale: explain which property each fibre contributes to the blend
📝 Exam Technique
D&T Exam Tips:
For textile questions: 1) Identify fibre type, 2) State properties, 3) Explain fabric construction, 4) Link to garment requirements, 5) Consider care, cost and sustainability.
For textile questions: 1) Identify fibre type, 2) State properties, 3) Explain fabric construction, 4) Link to garment requirements, 5) Consider care, cost and sustainability.
⚠️ Common Errors
Watch Out!
Students often make mistakes here. Wrong: Natural fibres are always more environmentally friendly than synthetic fibres. Correct: Cotton needs approx 10,000 litres of water per kg, heavy pesticide use. Polyester uses less water but consumes fossil fuels and sheds microplastics. A full LCA shows neither is clearly superior - organic cotton reduces pesticides; recycled polyester reduces fossil fuel dependence.
✍️ Model Answer
Full-Mark Response
A sportswear company is designing a running top. Evaluate 100% cotton, 100% polyester, and a cotton-polyester blend, recommending the best choice.
A grade 9 response will: identify requirements (moisture-wicking, lightweight, quick-drying); 100% cotton - absorbs sweat, heavy when wet; 100% polyester - wicks moisture, quick-drying, retains shape; cotton-poly blend - compromise but not enough wicking. Conclude: 100% polyester (or polyester-elastane blend) for performance running wear.
📊 AO Deep Dive
Assessment Objective Analysis
AQA D&T 8552: Written exam 50% + NEA 50%. AOs: AO1 Recall (20%), AO2 Apply (30%), AO3 Analyse & evaluate (50%). For grade 9, demonstrate sophisticated understanding of fibre properties and perceptive evaluation of material trade-offs.
📝 Exam Questions by Topic
🎬 Video Resources
Detailed Notes
Natural and Synthetic Fibre Classification
Textile fibres are classified as natural (plant-based cellulose or animal-based protein) or synthetic (manufactured from petrochemicals). Cotton is the most important natural cellulosic fibre, valued for its comfort, breathability and absorbency. British textile manufacturing was historically centred in Lancashire and Yorkshire, with Manchester known as 'Cottonopolis' during the Industrial Revolution. Wool, a natural protein fibre, remains significant in UK manufacturing, with British breeds like Bluefaced Leicester producing premium knitting yarns. Silk provides exceptional drape and lustre but is expensive and has limited UK production.
Synthetic fibres dominate global textile production, with polyester accounting for over 50% of all fibre production worldwide. Polyester offers excellent strength, dimensional stability and quick-drying properties, making it ideal for sportswear and outdoor clothing. Nylon provides superior abrasion resistance and was revolutionary when introduced in the 1930s, replacing silk in parachutes and stockings. Acrylic mimics wool's warmth at lower cost. Elastane (Lycra) provides exceptional stretch and recovery, essential in modern performance sportswear. UK outdoor clothing brands like Rab and Mountain Equipment specify technical synthetic blends for British weather conditions.
Example
A student designing a waterproof hiking jacket specifies a three-layer construction: a polyester outer fabric for durability and colour retention, a PTFE membrane (similar to Gore-Tex) for waterproofing with breathability, and a nylon inner lining for comfort against the skin and abrasion resistance. This layered approach demonstrates understanding of how different fibre properties combine in a functional textile product.
Fabric Construction Methods
Yarns are produced by spinning raw fibres together, creating continuous threads with specific twist levels and thicknesses. Woven fabrics are produced on looms by interlacing warp (lengthwise) and weft (crosswise) yarns. The simplest weave, plain weave, produces strong, stable fabrics like calico and muslin. Twill weave creates diagonal patterns, producing durable fabrics like denim and gabardine. Satin weave floats yarns over multiple crossings, creating smooth, lustrous surfaces. UK textile heritage includes Scottish tweed (harris twill weave) and English worsted suiting from the West Yorkshire mills.
Knitted fabrics are produced by interlooping yarns, creating stretchy, comfortable textiles. Weft knitting (hand knitting style) produces fabrics like jersey and rib, used in T-shirts and knitwear. Warp knitting creates stable, run-resistant fabrics used in sportswear and lingerie. Non-woven fabrics are manufactured by bonding fibres mechanically (needle-punching), chemically (adhesives), or thermally (melting), producing materials like felt, interfacing and surgical masks. GCSE students must understand how the construction method affects fabric properties, as exam questions frequently require justification of fabric choices for specific applications.
Example
A student designing a structured blazer selects a woven worsted wool fabric because its tight twill weave provides the dimensional stability required for tailored garment construction, unlike a knitted fabric which would stretch and distort under the same tailoring. They contrast this with their choice of a weft-knitted cotton rib for the inner sleeve cuff, where stretch is functionally desirable.
Sustainability in the UK Textile Industry
The fashion and textile industry is one of the world's largest polluters, responsible for approximately 10% of global carbon emissions and 20% of wastewater. The UK discards around 300,000 tonnes of clothing annually, with much ending in landfill. The Environmental Audit Committee's 2019 report 'Fixing Fashion' highlighted the need for extended producer responsibility and mandatory environmental targets. GCSE students must address textile sustainability in their NEA, considering organic and recycled fibres, low-impact dyes, and design for disassembly.
British textile manufacturing is experiencing a revival focused on sustainability and quality. Companies like Teemill on the Isle of Wight operate circular economy models, producing organic cotton T-shirts that can be returned and remade into new products. The UK's Textile 2030 initiative, coordinated by WRAP, aims to reduce carbon and water footprints across the textile supply chain. Innovation in fibre technology includes Pinatex (pineapple leaf fibre leather alternative), mushroom leather (mycelium-based), and recycled ocean plastic fabrics used by brands like Ellen MacArthur Foundation partners. Students who reference these developments demonstrate the contemporary industry awareness expected at higher grades.
Example
A student designing a sustainable school uniform polo shirt specifies organic cotton certified by GOTS (Global Organic Textile Standard) for the main body, with rPET (recycled polyester from plastic bottles) for the collar and cuff rib, justifying that organic cotton eliminates pesticide use in farming whilst rPET diverts plastic waste from landfill. They note the GOTS certification ensures environmental standards throughout the supply chain.
Comparison
Textile Fibre Properties Comparison
| Fibre | Source | Key Property | Construction | UK Application |
|---|---|---|---|---|
| Cotton | Natural (plant) | Breathable, absorbent | Woven or knitted | Clothing, medical textiles |
| Wool | Natural (animal) | Warm, elastic, flame-retardant | Woven or knitted | Suiting, knitwear, carpets |
| Polyester | Synthetic | Strong, quick-drying, stable | Woven or knitted | Sportswear, outdoor clothing |
| Nylon | Synthetic | Abrasion-resistant, tough | Woven or knitted | Hosiery, sportswear, ropes |
| Elastane/Lycra | Synthetic | Exceptional stretch, recovery | Blended with others | Activewear, swimwear |
| Silk | Natural (animal) | Lustrous, drapes beautifully | Woven | Luxury garments, linings |
Extended Practice
Q1: A UK outdoor clothing company is designing a waterproof jacket for hillwalking in British weather. Justify the selection of specific fibre types for the outer layer, waterproof membrane and inner lining, explaining how each fibre's properties contribute to the garment's overall performance.
Q2: Compare the sustainability credentials of organic cotton and recycled polyester for a school uniform manufacturer, discussing water usage, carbon footprint, recyclability and the UK Textile 2030 initiative targets.
Ready to ace your GCSE Design & Technology exams?
Get the best revision books and guides to boost your grades.