What is the difference between natural, synthetic and blended fibres, and how are fabrics constructed?
Textiles: natural, synthetic and blended fibres, the difference between them, woven, knitted and non-woven fabric construction, their physical and working properties, common examples and typical uses.
A focused answer to OCR GCSE Design and Technology J310 on textiles: natural, synthetic and blended fibres, woven, knitted and non-woven fabrics, their properties, examples and typical uses.
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What this dot point is asking
OCR J310 includes textiles among the six material categories. You need the fibre groups (natural, synthetic and blended), the difference between them, how fabrics are constructed (woven, knitted, non-woven), their properties, common examples, and typical uses. In the written exam this is tested by explaining the natural/synthetic difference and the benefits of a blend.
Natural, synthetic and blended fibres
A common trap is viscose (rayon): it is regenerated from natural cellulose, so it is neither a pure natural nor a fully synthetic fibre.
Fabric construction
How a fabric is constructed affects its properties as much as the fibre: a woven cotton shirt and a knitted cotton T-shirt feel and behave very differently though both are cotton.
Properties and uses
Choose textiles by weighing comfort and breathability, strength and durability, stretch, crease resistance, absorbency, warmth, appearance and cost. Natural fibres win on comfort next to the skin; synthetics win on strength, easy care and quick drying; blends balance the two.
Try this
Q1. State the source of a natural fibre and give one example. [2 marks]
- Cue. Plant or animal; for example cotton (plant) or wool (animal).
Q2. Give one reason a fabric might be knitted rather than woven. [1 mark]
- Cue. Knitted fabric stretches and is comfortable (woven is more stable but does not stretch).
Exam-style practice questions
Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
OCR J310/01 20192 marksExplain the difference between a natural fibre and a synthetic fibre, giving an example of each.Show worked answer →
A 2-mark question, one mark for the distinction and one for two examples.
A natural fibre comes from a plant or animal source (for example cotton from the cotton plant, wool from sheep). A synthetic (man-made) fibre is manufactured from chemicals, usually from oil (for example polyester, nylon, elastane).
Markers reward the source distinction (plant/animal versus made from chemicals) and a correct example of each. The classic trap is calling viscose "synthetic": it is regenerated from natural cellulose, so it sits between the two. Defining only one type, or no example, caps the mark at one.
OCR J310/01 20214 marksExplain why a polyester and cotton blend is often used for school shirts instead of pure cotton.Show worked answer →
A 4-mark Explain wants the benefits of blending applied to the shirt.
Blending mixes fibres to combine their best properties. Cotton is comfortable, breathable and absorbs sweat, which is good against the skin, but it creases easily and is slow to dry. Polyester is strong, crease-resistant and dries quickly, but it is less breathable on its own. A polyester and cotton blend gives a shirt that is comfortable and breathable (from the cotton) yet strong, crease-resistant and quick to dry (from the polyester), so it needs less ironing and lasts longer.
Markers reward: blending combines properties, the cotton contribution (comfort, breathable, absorbent) and the polyester contribution (strong, crease-resistant, quick-drying), applied to the school shirt. A bare list with no application caps the mark.
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Sources & how we know this
- OCR GCSE (9-1) Design and Technology (J310) specification — OCR (2017)