Natural or synthetic
- Created by: markalex
- Created on: 11-01-15 12:39
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- Natural or synthetic
- Kevlar
- Kevlar is lightweight, tough synthetic fibre used for lining of bicycle tyres and to replace damaged ligaments
- By weight, Kevlar is five times stronger than steel
- Bullet-proof police vests benefit from layers of Kevlar fibres woven together
- The fibres spread the force of a bullet over a large surface area.
- In addition, a layer of resin hardened glass fibre between the Kevlar layers prevents knife blades entering the jacket.
- Kevlar is lightweight, tough synthetic fibre used for lining of bicycle tyres and to replace damaged ligaments
- Shape affects properties
- Articles of clothing with a larger surface area have more surface molecules to absorb moisture
- They also dry quicker . You do not scrunch up clothes to dry them!
- Objects with a larger surface area cool down quicker. Thicker materials are better for thermal insulation and maintaig body tempreture
- Natural Fibre
- Disadvatages
- Limited number avalible
- Ignite easily
- Can shrink in the wash
- Advantages
- Obtained without much chemical process
- Biodegradble
- Absorb water, so are comfortable
- Disadvatages
- Synthetic Fibre
- Advantages
- Inexpensive to make
- Strong and hard-wearing
- Resistant to abrasion, creasing an stainging
- Can be brightly couloured
- Dry quickly after washing
- Disadvantages
- Low melting point
- Non-biodegradable
- Can feel clammy and stick to skin, so limiting breathabillity
- Advantages
- Kevlar
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