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els plastics
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QUE ÉS UN PLASTIC?els plastics i els seus origens
● Els plastics son subtàncies quimiques formades per atoms (principalment de
carboni i hidrogen)
● Els plastics poden ser naturals o sintetics les materies primeres dels polimers
naturals poden ser vegetals o animals
polimers naturals polimers sintètics
caseîna de la llet,celulosa . Els nous devirats del pretoli, del carbo i de gas ,
bioplàstics son plàstics naturals no son son biodegradables i poden
obtinguts del processament de la fecula provocar prolemes ambientals. son els
de patata, el mido de blat de moreo o mes utlitzats i fabricats
l’oli de soja
propietats del plastics
, QUE ÉS UN PLASTIC?
quins tipus de plastics hi ha ?
Elastomers
cautxú sintètic neoprè silicones poliuretà
es quimicament es molt resisitent són quimicament forma de escumes
inert, flexible quimicament i inerts, estable a flexibles per illants
resistent i moltbon aillant altes temperatures
impermeable. tèrmic
termostables
melamina resina epoxi resina epoxi
s’utilitza en lamines de s’epra en pintura i adesius emprada amb l’adicció de
recobriment de mobles fibra vidre
etc
termoplastics
HDPE PET PP PVC PS PLA PTFE
Polietilè Polietilè Polipropi Policlorur Poliestiè Àcid Politetraf
d'alta tereftalat: lè de vinil polilàctic luoretilè
densitat
Plàstic Emprat Lleuger i Flexible o Lleuger i Biodegra Resistènc
resistents en resistent, rígid, transpare dable, ia a altes
, utilitzat ampolles envasos i tuberíes i nt, impressió temperat
en d'aigua i peces revestime envasos i 3D i ures,
envasos i tèxtils. d'automò nts. estris de envasos. revestime
canonade bils. plàstic. nts
s. antiadher
ents.
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