Technological materials and their envoirment impact

Technological materials and their envoirment impact

1. Technical materials

   • Raw materials
   • Natural materials
   • Processed materials
     • Woods
     • Metals
     • Plastics
     • Textiles
     • Construction materials

2. Choosing materials

   • If I want to build...
     • A BRIDGE
       • I need a STRONG material
     • A SCULPTURE
       • I need an ATTRACTIVE material
     • AN AEROPLANE
       • I need a LIGHTWEIGHT material
     • A TOY
       • I need a NON-TOXIC material
   • SENSORY PROPERTIES
     • Colours
     • Feels
     • Textures
     • Brightess
     • Transparency
   • MECHANICAL PROPERTIES
     • Hard/Soft
     • Tough/Brittle
     • Elastic/Plastic
     • Malleable
     • Ductile

3. Wood

   • We obtain it from the bark of the tree trunks
   • OBTAINING PROCESS
     • Felling
       • Debarking
         • Transport to the sawmill
           • Sawing for end use
             • Drying
               • Cleaning, planing and sanding
                 • Treatments and finishes
   • TYPES
     • Softwoods: cheap and uniform quality
       • Pine
       • Fir
       • Poplar
     • Hardwoods: more expensive and better-quality
       • Oak
       • Chestnut
       • Beech
   • WOOD PRODUCTS
     • Chipboard
     • Paper
     • Cork
     • Cardboard
     • Plywood

4. Metals

   • Charcteristics
     • Are HARD
     • Good conductors of HEAT, ELECTRICITY and SOUND
   • Classification
     • Depending on whether or not they have iron in their composition, they can be:
       • NON-FERROUS
         • Copper
         • Tin
         • Alumninium
         • Zinc
       • FERROUS
         • Iron
         • Steel
         • Cast iron

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