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PLASTICS - Coggle Diagram
PLASTICS
, there are other properties that are common to the maionty of decompose by a natural,
plastics
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other properties
: low density, impermeabihty
mechanical
malleabrlity, ductility, mechanical resistance
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Vacuum forming
We extract the air below the sheet so that the plastic ts pulled against
the instde walls of the shaped mould, and the desired form ts created
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We leave the mould to cool, then remove the obiect
Thermostable plastics
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When heated, they become soft and can be shaped When cooled, they cannot be remoulded by applying heat
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Elastomers
They are hard, resistant and very elastic — stretching easily under force.
They' re formed by chains linked laterally and then folded over themselves, like a ball of wool or strtng
Made by vulcanisationi mixing sulphur and rubber, and heating to 160ºC
Formation techniques
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When we manufacture plasttc obiects ln Industry, the plastic Is avadable In three different forms, powder, granules and resins.
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Lamination
Thermoplastic produced by the extrusion method ls passed through a senes of hot cylinders to produce sheets of varying thtckness
With this technique, we can produce different finishes, for example, glossy, matt or textured. This depends on the outer coating applied by the final cylinder.
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Ecological properties
There are three recycling processes; chemical,
mechantcal and energetrc
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Energetic recycling. We can incinerate plastics and the energy that is produced is used tn industry, for heating or producing electnctty.
Chemical recycling. We apply chemical processes to make netv
matenals from the ongtnal components of plasuc residues.
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Joining plastics
When plastics have been formed, shaped and finished, we
can loin pieces to each other
Plastics are materials formed by polymers. The polymers in plastics are
made from long chains of carbon atoms.
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