Ina ia lelei i le fausiaina ma le gaosiaina o oloa palasitika, e tatau ona tatou malamalama o ituaiga ma faʻaogaina o palasitika.
Palasitika o se ituaiga o maualuga molemika tuʻufaʻatasia (macrolecules) lea e polymerized e faʻaopopo polymerization poʻo polycondensation tali atu ma monomer o mata mea. E tele ituaiga o uga ma eseʻese meatotino, ae e faigofie ona mama i le mamafa, faigofie ona fausia, faigofie ona maua mea mata ma maualalo i le tau, aemaise lava le sili atu lelei pala, tetee ma faʻaola vevela, afaina tetee meatotino e lautele faʻaaogaina i pisinisi ma le soifuaga o le tagata.
Uiga o Palasitika:
(1) O le autu vaega o palasitika mata mea o polymer matrix taʻua resin.
(2) palasitika i ai lelei faʻaʻesega mo eletise, vevela ma leo: faʻaʻesega eletise, arc tetee, vevela faasaoina, leo faʻaʻesega, leo mitiia, gatete mitiia, sili leo paʻu gaioiga.
(3), lelei gaioiga, ala i tui suia, mafai ona faia i oloa ma faigata foliga, fale o manu tele ma lelei lelei i se puʻupuʻu taimi.
(4) Palasitika mata mea: o se ituaiga o mea ma polymer gaosia gaosia (polymer) o le autu vaega, infiltrating i totonu o ausilali eseese mea poʻo ni faʻaopoopoga ma faʻapitoa faʻaaogaina, i ai palasitika ma suavai i lalo o le faʻapitoa vevela ma le mamafa, lea e mafai ona suia i se ituaiga foliga ma tausia le foliga le suia i lalo o nisi tuutuuga ..
Faʻavasegaina palasitika
E tusa ai ma le molekula fausaga o gaosia resin, palasitika mata mea masani aofia ai thermoplastic ma thermosetting uga: mo thermoplastic uga, palasitika mea o lo o palasitika ina ua uma ona toe faʻavevela e tele PE / PP / PVC / PS / ABS / PMMA / POM / PC / PA ma isi mea masani masani. Thermosetting palasitika tele lava faʻasino i le palasitika faia e le faʻavevela ma faʻamaʻaina resin gaosia, e pei o nisi phenolic palasitika ma amino palasitika. Polymer e aofia ai le tele o laiti ma faigofie molelaʻau (monomer) e covalent fusia.
1. Faʻavasegaina e tusa ma uiga o resin i le taimi o le faʻamafanafana ma le maluluina
(1) Thermoset palasitika: pe a uma le faʻamafanafanaina, o le molelaula fausaga o le a tuʻufaʻatasia i totonu o se fesoʻotaʻiga foliga. A uma loa ona tuʻufaʻatasia i totonu o le network polymer,
o le a le faʻamaluluina tusa lava pe a maeʻa ona toe faʻaola, faʻaali mai le mea e taʻua o [suiga le mafai ona suia], lea e mafua mai i le suiga o le molelaulalo (suiga o vailaʻau).
(2), thermoplastics: e faʻasino i le palasitika o le a liusuavai ina ua maeʻa le vevela, tafe i le suia mo le faʻamaluluina ma fausiaina, ona liusuavai lea pe a maeʻa le vevela. E mafai ona faʻamafanafanaina ma faʻamalulu e maua ai [suiga fesuiaʻi] (suavai ← → mausali), o le mea lea e taʻu o le suiga o le tino.
A. Lautele palasitika: ABS, PVC.PS.PE
B. Lautele inisinia palasitika: PA.PC, PBT, POM, PET
C. Maeaʻe inisinia uga: PPS. LCP
E tusa ai ma le lautele o le apalai, e tele lava ina lautele palasitika e pei o PE / PP / PVC / PS ma inisinia palasitika e pei o ABS / POM / PC / PA. I se faʻaopopoga, o loʻo i ai ni faʻapitoa palasitika, e pei o le maualuga o le vevela ma le susū o le teteʻe, o le tetee atu i le pala ma isi palasitika faʻaleleia mo faʻamoemoe faʻapitoa.
2. Faʻavasegaina i le faʻaaogaina o palasitika
(1) Lautele palasitika o se ituaiga o lautele faʻaaogaina palasitika. E tele lona gaosiga, e tusa ma le tolu kuata o le aofaʻi o palasitika, ma o lona tau e maualalo. E lautele faʻaaogaina e fai ai mea manaʻomia i aso uma ma sina faʻamamafa, pei o le TV atigi, telefoni atigi, pesini palasitika, palasitika paelo, ma isi. E i ai se vavalalata vavalalata ma tagata ma ua avea ma taua taua o le palasitisi pisinisi. E masani ona faʻaaogaina lautele palasitika o PE, PVC, PS, PP, PF, UF, MF, ma isi.
(2) Inisinia palasitika E ui lava o le tau o lautele lautele uga, o ona masini meatotino, vevela teteʻe ma tetee corrosion e faigata ona faʻamalieina manaʻoga o fausaga mea i nisi inisinia ma masini. O le mea lea, na amata ai ona faʻamafanafana palasitika. E i ai le maualuga masini malosi ma le maʻaʻa, mafai ona suia nisi uʻamea poʻo le-ferrous mea, ma mafai ona gaosia vaega masini poʻo inisinia faʻafitauli vaega ma faigata fausaga, o le tele o ia e sili atu le aoga nai lo le muamua na mea O le masani inisinia palasitika o PA, ABS, PSF, PTFE, POM ma le PC.
(3) Faʻapitoa palasitika mata mea, o lo o i ai tulaga ese gaioiga, mafai ona faʻaaogaina i nisi faʻapitoa taimi, pei o maneta faʻataʻitaʻi palasitika, ionomer palasitika, pearlescent palasitika, photosensitive palasitika, vailaʻau palasitika, etc.
Faʻaogaina o 10 ituaiga palasitika resins:
1. Palasitika lautele
(1) .PP (polypropylene): o le susunuina ei ai le manogi o le suauʻu, o le moli lanu i tua lanu e lanumoana; vai opeopea.
Homopolymer PP: translucent, flammable, wire draw, eletise masini, laupapa, oloa o aso uma.
Copolymerized PP: lanu masani, susunuina, masini eletise, mea faigaluega i le fale mea faʻaaoga, koneteina.
Random copolymerization PP: maualuga malamalama, susulu, masini faʻafomaʻi, koneteina meaai, oloa teuina
(2) .ABS (polystyrene butadiene propylene copolymer): maualuga glossiness, asu mu, manogi tofo; vai magoto
ABS mea mata: maualuga maʻaʻa ma le malosi, mumu; atigi eletise, ipu, mea faigaluega, mea faifaaili
ABS suiga: faʻateleina le maʻaʻa ma le mumusu faʻafouina, le susunuina; taʻavale vaega, eletise vaega
(3) .PVC (polyvinyl chloride): manogi o le chlorine mumu, lanumeamata i le pito i lalo o le afi; vai magoto
PVC maumaututū: maualuga malosi ma maaʻa, mumū faʻafuaseʻi; mea fau fale, paipa
Filemu PVC: fetuutuunai ma faigofie e faʻagasolo ai, faigata ona susunuina; meataalo, mea taulima, teuteuga
2. Palasitika inisinia
(1) .PC (polycarbonate): mumu samasama, asu uliuli, tofo faʻapitoa, vai magoto; maumaututū, maualuga transparency, afi-retardant; feaveaʻi numera, CD, taʻitaʻia, mea e manaʻomia i aso uma
(2) .PC / ABS (uʻamea filogia): faʻapitoa manogi, samasama uliuli asu, loloto vai; malo maʻaʻa, paʻepaʻe, mumū o le afi; mea eletise, mea faigaluega mea, fesoʻotaʻiga mea faigaluega
(3) .PA (polyamide PA6, PA66): lemu le natura, asu samasama, manogi mumu o lauulu; maʻaʻa, maualuga malosi, mumū faʻafuaseʻi; masini, vaega masini, eletise vaega
(4) .POM (polyformaldehyde): mu samasama pito, pito i lalo lanumoana, manogi formaldehyde; maaa, maualuga malosi, mumu; kia, masini vaega
(5) .PMMA (polymethyl methacrylate); tofo faʻapitoa faʻapitoa: maualuga malamalama transmittance; plexiglass, galuega taulima, teuteuga, afifiina, ata tifaga tausisia
3. Palasitika Elastomer
(1) .TPU (polyurethane): tofo faʻapitoa; lelei elasticity, maʻaʻa ma laei teteʻe, susunuina; masini vaega, eletise vaega
(2) .TPE: faʻapitoa manogi, samasama mumu; SEBS toe faʻaleleia, faʻamalosi tino faʻapaleni, lelei vailaʻau meatotino, mumu; meataʻalo, faʻailoga tui lona lua, taga faʻamau, uaea, taʻavale vaega, taʻaloga meafaigaluega.
E fa ituaiga o palasitika teuteuina tekonolosi: tui suia, extrusion suia, calendering suia ma suia. Tui tuiina o le autu gaioiga e maua ai laʻasaga faigata ma le saʻo lapopoʻa vaega palasitika. Tui gaosiga manaʻomia faalagolago i tolu elemene o tui suia, tui masini ma palasitika mata mea e faamaea ai le faiga.Mestech taulai atu i palasitika tui suia gaosiga ma palasitika suia vaega mo sili atu i le 10 tausaga, ma ua faaputuputu mauoa tekonolosi ma poto masani. Matou te tuuto atu e avatua ia te oe ma suia gaosiga ma palasitika vaega suia auaunaga, faʻamolemole faʻafesoʻotaʻi matou.
Taimi Post: Oketopa-16-2020