Learning objective
students should be able to demonstrate a knowledge of: • wet spinning of regenerated fibres • melt spinning of synthetic fibres to give very fine, smooth continuous filaments. Understand how fibre production can affect the fibre formation. Yarn production.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Performance characteristics of materials
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Performance characteristics of materials
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Quick explanation
students should be able to demonstrate a knowledge of: • wet spinning of regenerated fibres • melt spinning of synthetic fibres to give very fine, smooth continuous filaments. Understand how fibre production can affect the fibre formation. Yarn production
- This point belongs to Performance characteristics of materials, especially Performance characteristics of materials.
- You need to be able to students should be able to demonstrate a knowledge of: • wet spinning of regenerated fibres • melt spinning of synthetic fibres to give very fine, smooth continuous filaments. Understand how fibre production can affect the fibre formation. Yarn production.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect Performance characteristics of materials to exam-style questions, flashcards, and revision notes for Performance characteristics of materials.
Quick student answer
What is the primary method used for producing regenerated fibres like viscose?
Direct answer
Wet spinning is the primary method used for producing regenerated fibres such as viscose.
Key terms
- Regenerated fibres: Fibres made from natural materials that have been chemically processed to create a new fibre, such as viscose or lyocell.
- Synthetic fibres: Fibres made from man-made materials, typically through processes like melt spinning, including polyester and nylon.
Common trap
Confusing fibre production methods: Remember that wet spinning is used for regenerated fibres, while melt spinning is for synthetic fibres.
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Related learning objectives
- Performance characteristics of fibres.
Performance characteristics of materials
- Students should be able to name different types of fibres.
Performance characteristics of materials
- Students should be able to describe the performance characteristics of fibres, including: • absorbency • strength • elasticity • flammability • thermal qualities • lustre • handle.
Performance characteristics of materials
- Students should be able to explain the different fibres and their specific performance characteristics, including: • plant/cellulose fibres: very absorbent, little elasticity, good strength, poor insulators • animal/protein fibres: very absorbent, thermally insulating • regenerated fibres: poor strength, soft, highly absorbent, crease badly • new generation lyocells: with improved performance characteristics • synthetic fibres: very good strength, totally non-absorbent, smooth, lightweight, do not crease, can be heat set (thermoplastic).
Performance characteristics of materials
- Students should be able to explain the shape and formation of fibres. They should understand and be able to discuss the different cross- sectional and linear formation of fibres that can occur in natural form, and those that can be engineered during synthetic and manmade fibre production. Understand how the physical shape and formation of fibres affect their performance. 12 Visit aqa.org.uk/7562 for the most up-to-date specification, resources, support and administration Fibre production.
Performance characteristics of materials