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PLASTICS (Plastics (Origin (Natural (For example (Cellulose, Latex), Are…

- - - - Are obtained directly from raw vegetable materials
      - For example
        
        Cellulose
        
        Latex
    - - From compounds extracted from
        
        Natural gas
        
        Carbon
        
        Petroleum
  - - - Fibreglass
      - Textile fibres
      - Paper
      - Silica
      - Sawdust
    - - Chemical additives
        
        To increase flexibiilty and to
        strengthen the polymers
      - Pigments
        
        To give colour to
        the plastics.
  - - - mechanical: malleablity, ductility, mechanical resistance
      - acoustic: acoustic insulation
      - electrical: electrical insulation
      - thermal thermal insulation
      - other properties: low density, impermeability
  - - - Chemical recycling :We apply chemical processes to make new
        materials from the original components of plastics residues.
      - Mechanical recycling :We make new products from plastic
        granules
        
        Separation and crushing.
        
        Floating.
        
        Agglutination.
        
        Extrusion.
        
        Pelletising.
      - Energetic recycling. :We can incinerate plastics and the energy that
        is produced is used in industry, for heating or producing electricity.
- - - - We inject melted thermoplastic into a mould
      - When the material has cooled and solidified, we extract tt from the mould
    - - We put a tubular-shaped piece of plastic into a hollow mould which has the same shape as the oblect that we want to make
      - We close the mould and blow pressurised air into it, so that the plastic adheres to the sides of the mould and takes its shape.
      - When the object is cold, we remove it from the mould.
    - - We put thermostable plastic,which can be in granular form,
        into the base of a cavity mould.
      - The outer part of the cavity mould, shaped the same, is closed to compress the material inside We then heat it and it becomes soft and malleable
      - The plastic adapts to the shape of the cavity between the two parts of the mould
      - We extract the object when the plastic has cooled and solidified
- - - - Cutter
      - Scissors
      - Steel bit
      - Fretsaw
      - Jig saw
      - Power press
      - Hot metal thread trimmer
    - - Drill bit
    - - File
      - Rasp
- - - - Bolt
      - Nut