1. Processes for obtaining plastics consists of two steps
Sourcing of raw material.
Synthesis of monomers.
2. Sourcing or raw material
It comes from mineral: petroleum, coal and fossil fuels
that need a long industrial process.
plant: latex, cotton and wood
cellulose.
animal: casein found in milk.
3. Synthesis of monomers
it is important in plastics that come from petroleum
fossil fuels
There are three processes thermocompression
extrusion molding
blow molding
4. Thermocompression: used to produce thermosetting plastic
products they pass to a hot mold
when it cools, the mold opens
Extrusion molding: used to make pipes and bars. Plastic passes to
a heat pipe
it is expulsed
through a
shaping opening
5. Blow molding: used to make liquid containers
putted in a mold with it is stiked to the walls
pressurized air
then they
open it and take the plastic
