1. O le a le palasitika?
O palasitika o mea faʻapipiʻi polymeric e faia mai le monomer e fai ma mea mata e ala i le faʻaopoopoga poʻo le polymerization condensation.
O se filifili polymer o le photopolymer pe afai e polymerized mai se monomer tasi. Afai e tele monomers i se filifili polymer, o le polymer o se copolymer. I se isi faaupuga, palasitika o se polymer.
2. Fa'avasegaina o palasitika
E mafai ona vaevaeina palasitika i palasitika thermoplastic ma thermosetting e tusa ai ma le setete pe a uma ona vevela.
Thermosetting palasitika o se palasitika e iai uiga faʻamafanafana, faʻamalolo ma le mafai ona faʻafefe, e le faʻafefe. O lenei palasitika e mafai ona na o le tasi ona fai.
E masani lava ona lelei tele le fa'atinoga o le eletise, ma e mafai ona tatalia le vevela maualuga.
Ae o lona fa'aletonu autu o le fa'agasologa o le saosaoa e telegese ma e faigata le toe fa'aaogaina o mea.
O nisi o palasitika thermosetting masani e aofia ai:
Phenol plastic (mo au ulo);
Melamine (faʻaaogaina i laminates palasitika);
Epoxy resin (mo mea faʻapipiʻi);
Polyester le tumu (mo le tino);
Vinyl lipids (faʻaaogaina i tino taʻavale);
Polyurethane (mo alo ma foam).
Thermoplastic o se ituaiga palasitika e mafai ona faʻafefe i se vevela, faʻamalosi pe a maeʻa le malulu, ma e mafai ona toe faia le gaioiga.
O le mea lea, e mafai ona toe faʻaaogaina le thermoplastics.
O mea nei e masani ona toe fa'afitu taimi a'o le'i fa'aleagaina le fa'atinoga.
3. Faʻapipiʻi palasitika ma faiga faʻavae
O lo'o i ai le tele o auala fa'agaoioiga e fa'aaogaina e fai ai palasitika mai fasimea i oloa fa'auma eseese, o mea nei e masani ona fa'aaogaina:
Su'e tui (o le auala sili ona taatele o le gaosiga);
Fa'ali'i (faia o fagu ma oloa ga'o);
Extrusion mole (gaosiga o paipa, paipa, talaaga, uaea);
Feula ata (faia o taga palasitika);
Loli lo'o (gaosi oloa ga'o tetele, e pei o koneteina, polo);
Vacuum fai (gaosiga o afifi, pusa puipui)
4. Meatotino ma fa'aogaina o palasitika masani
E mafai ona vaevaeina palasitika i palasitika lautele, palasitika inisinia, palasitika faʻainisinia faʻapitoa ma isi.
Palasitika lautele: e faasino i le palasitika sili ona faʻaaogaina i lo tatou olaga, o le tele o ituaiga palasitika e masani ona aofia ai: PE, PP, PVC, PS, ABS ma isi.
Inisinia palasitika: palasitika faʻaaogaina e fai ma mea faʻainisinia ma sui mo uʻamea i le gaosiga o vaega masini, ma isi.
Inisinia palasitika o loʻo i ai le faʻatinoga lelei atoatoa, maualuga maualuga, fetolofi, malosi faʻainisinia maualuga, lelei le vevela, faʻapipiʻi eletise lelei, ma e mafai ona faʻaaogaina i vailaʻau faʻamalosi ma le siosiomaga faaletino mo se taimi umi.
I le taimi nei, e lima palasitika faʻainisinia masani: PA (polyamide), POM (polyformaldehyde), PBT (polybutylene terephthalate), PC (polycarbonate) ma PPO (polyphenyl ether) o loʻo faʻaaogaina lautele i vaega eseese pe a maeʻa suiga.
Palasitika faʻainisinia faʻapitoa: palasitika faʻainisinia faʻapitoa e faʻatatau i se ituaiga o palasitika faʻainisinia e maualuga le faʻatinoga, faʻatinoga faʻapitoa ma faʻatinoga lelei, ma le faʻaaogaina umi o le vevela ile 150℃. E masani ona faʻaaogaina i mea tau eletise, eletise, pisinisi faʻapitoa ma isi matata faʻatekonolosi.
E iai le polyphenylene sulfide (PPS), polyimide (PI), polyether ether ketene (PEEK), polymer tioata vai (LCP), nylon maualuga (PPA), ma isi.
5. O le a le palasitika biodegradable?
O palasitika e masani ona matou faʻaogaina o macromolecules umi-chain e maualuga polymerized ma faigata ona faʻamavaeina i le siosiomaga masani. O le susunuina po'o le lapisi e mafai ona mafua ai le tele o le afaina, o lea e suʻe ai e tagata ni palasitika faʻaleagaina e faʻaitiitia ai le mamafa o le siosiomaga.
Palasitika fa'aleagaina e masani ona vaevaeina i palasitika photodegradable ma palasitika biodegradable.
Photodegradable plastics: I lalo o le gaioiga o le malamalama ultraviolet ma le vevela, o le filifili polymer i le fausaga palasitika ua malepelepe, ina ia ausia le faʻamoemoe o le faʻaleagaina.
Palasitika Biodegradable: I lalo o tulaga masani, o meaola ninii i le natura e motusia filifili uumi o fausaga polymer, ma iu ai ina eliina fasi pepa palasitika ma metabolized e microorganisms i le vai ma le carbon dioxide.
I le taimi nei, palasitika faʻaleagaina ma faʻatau pisinisi lelei e aofia ai le PLA, PBAT, ma isi
Taimi meli: 12-11-21