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PLASTICS (FORMATION TECHNIQUES (Vacuum Forming:We use plastic sheets with…

- - - - During the manufacturing process, we can add matenals such as
        flbreglass, textile fibres, paper. To reduse the costes
      - We can incorporate chemical additives to increase flexibility and pigments to give colour
      - The transformation of these raw materials and compounds into plastics
        is called polymerisation.
- - - - 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 theplastic adheres to the sides of the mould and takes its shape.
      - When the object is cold, we remove it from the mould.
    - - The outer part of the cavitymould, shaped the same, is
        closed to compress the matenalinside We then heat it and it
        becomes soft and mafleabie
      - We put thermostable plasuc, which can be in granular form,
        into the base of a cavity mould.
      - The plastic adapts to the shape of the cavity between the two parts of the mould
      - We extract the oblect when the plastic has cooled and solidified
    - - We inject melted thermoplastic into a mould
      - When the material has cooled and solidified, we extract from the
        mould
- - - - electrical: electrical insulation
      - thermal: thermal insulation
      - acoustic: acoustic insulation
      - other properties: low-density,impermeability
      - mechanical: malleability, ductility, mechanical resistance