PLASTICS AND TEXTILES

PLASTICS AND TEXTILES

1. PLASTICS

   • ORIGIN
     • SYNTHETIC PLASTICS
       • COMPOUNDS FROM PETROLEUM,CARBON AND NATURAL GAS
     • NATURAL PLASTICS
       • ANIMAL SOURCES
       • VEGETABLES
   • PROPERTIES
     • RESISTANT
     • INSULATORS
     • DUCTIBLE
     • MALLEABLE
     • LIGHT
     • IMPERMEABLE
     • RECYCABLE
       • THERE ARE TWO CLASSES:   - BIODEGRADABLE PLASTIC: THEY AREN´T RESISTANT BY BIOLOGICAL AGENTES, BACTERIAS...  - NON-BIODEGRADABLE PLASTIC: ARE      MADE FROM PETROLEUM 
       • CHEMICAL RECYCLING
       • MECHANICAL RECYCLING
       • ENERGY RECOVERY
   • CLASSIFICATIONS
     • BY INTERNAL STRUCTURE
     • FOR INDUSTRIAL PURPOSES
       • THREE GROUPS
         • THERMOPLASTICS
         • THERMOSETTING PLASTICS
         • ELASTOMERS
   • FORMING TECHNIQUES
     • EXTRUSION
       • IN THE FORM OF PELLETS,THEN, THEY WILL BE A LIQUID BECAUSE OF HEATED CYLINDER. AND THEN,THEY PASS FOR A EXTRUSION DIE AND THEY BATH WITH COLD WATER
     • CALENDERING
       • PASSED BETWEEN ROLLERS
     • VACUUM FORMING
       • PLACED OVER A MOULD, THEN, THEY ARE HEATED AND THEN THE AIR POMPED MAKE THE SUCKED TO CREATE THE VACUUM
     • MOULDING
       • INJECTION
         • THE PELLETS ARE HEATED AND ARE INTRODUCED INTO A MOULD AND PUSHED WITH A MOULD
       • BLOW
         • THE PASTIC ARE PUSHES AGAINST THE SIDES OF A MOULD WITH COMPRESSED AIR
       • COMPRESSION
         • PUT PELLETS OR POWDER INTO A MOULD AND COMPRESED IT AND THEN, THEY ARE COOLED TO HAVE HIS SHAPE
   • MODIFICATIONS TECHNIQUES
     • MEASURING
     • DRAWING MARKS AND LINES
     • CUTTING
     • DRILLING
     • FILING AND SANDING
     • JOINING