Page 66 - Maeve Whelan
P. 66

STEP 4: SPRAYED TEMPLATE WITH CRYSTAL CLEAR
                                                   STEP 2: PRIME TEMPLATES                                                                                       LACQUERE
















           STEP 1: FORM THE TEMPLATES                                                        STEP 3: SPRAYED TEMPLATE WITH MATT BLUE





 Manufacturing  Acrylonitrile Butadiene                                                                                                                                       Manufacturing


                            Styrene




 •Creating  carbon  fibre  involves  both       ABS or Acrylonitrile butadiene styrene is a                                                                              •ABS is most commonly polymerized through
 chemical and mechanical processes.  common thermoplastic polymer usually used in                                                                                        the process of emulsion

      injection molding applications. This plastic
 •It begins by drawing long fiber strands and   engineering is popular due to its low cost of                                                                            •Emulsion polymerization. This is a two step

 then  heating  them  at  a  very  high              production  and  the  ease  with  which  the                                                                        process.
 temperature without allowing oxygen to   material   is   machined   by   plastic

 come into contact, to prevent the fibers   manufacturers.                                                                                                               •In the first step a rubber latex is made,

 from burning.                                                                                                                                                           usually in a batch process.
      Acrylonitrile-Butadiene-Styrene  has  been

 •This is when carbonization happens, which   available since the 1940s. In an effort to                                                                                  •In the second step, which can be operated
 is when the atoms within the fibers vibrate   manufacture bulletproof  plastic  sheets                                                                                  as  batch,  semi-batch  and  continuous,

 violently, expelling most non-carbon atoms.   during the last years of World War II, polymer                                                                            styrene and acrylonitrile are polymerized in

      systems  have  been  produced  from  unique                                                                                                                        the rubber latex solution to form an ABS
 •This leaves a fiber made up of long, tightly   butadiene   acrylonitrile   copolymers   and       EXAMPLES                                                             latex.

 interlocked chains of carbon atoms with   styrene acrylonitrile  copolymers  with  high
 just a few non-carbons.  molecular mass.                                                                                                                                •The  ABS  polymer  is  recovered  through

                                                                                                                                                                         coagulation of the ABS latex by adding a
 •A typical sequences used to form carbon   There are countless applications for ABS.                                                                                    Destabilizing agent.

 fibers  from  polyacrylonitrile  involves     Among the most widely identifiable are keys
 spinning,  stabilizing,  carbonizing,  treating   on a computer keyboard, power-tool housing,                                                                           •The  resulting  slurry  is  filtered  or

 the surface and sizing.  the plastic face-guard on wall sockets (often                                                                                                  centrifuged to recover the ABS resin.

      a PC/ABS blend), and LEGO toys.
                                                                                                                                                                         •The ABS resin is then dried.
   61   62   63   64   65   66   67   68   69   70   71