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Lauren Guest

Plastics

They are 3 types of plastics:

Thermoplastics - can be reheated and reshaped as they have loose monomer chains, can
be recycled and coloured pigments can be added to make it more aesthetically pleasing.
Thermosets ­ undergo a chemical change so permanently rigid, cannot be reheated or…

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Lauren Guest

Biodegradable' polymers

Plastics normally don't break down easily ­ often thrown away. Biodegradable plastics
degrade in a biologically rich environment.
Used for carrier bags, plastic bottles and detergent sachets.
Compostable polymers ­ Cellulose based polymers such as biopol, which is an
environmentally friendly, quality biodegradable plastic produced thought…

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Lauren Guest

Step four ­ When the polymer has cooled and has had time to solidify the mould halves
are opened and the product is released from the mould.
Advantages: Produces complex 3D shapes, large numbers can be produced with
consistent quality, Metal insets can be included.
Disadvantages: Initial set…

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Lauren Guest

Additives:

Fillers ­ used to reduce bulk of plastic so cheaper e.g. sawdust (increases strength and
hardness)
Flame retardants ­ used to reduce risk of combustion, releases agents that stifle it.
Ant-static agents ­ reduce effect of static charges that could build up
Plasticiser ­ added to improve…

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Lauren Guest




Flexible MDF: grooves are cut into the material allowing it to bend slightly, meaning
curved shapes can be created. Can come in large sizes so large curved wood furniture can
be created, stable, no defects. Flexi ply, can be bent and curved to create curves in wood,
they…

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