1. Dab tsi yog yas?
Cov Huab Cua Polymeries ua los ntawm monomer yog cov khoom siv raw los ntawm kev ntxiv lossis hws polymerization.
Polymer saw yog photopolymer yog tias nws yog polymerized los ntawm ib tus monomer. Yog tias muaj ntau tus monomers hauv cov saw polymer, cov polymer yog copolymer. Hauv lwm lo lus, yas yog cov polymer.
2. Kev Sib Tw ntawm Plastics
Cov plastics tuaj yeem faib ua thermoplastic thiab thermosetting plastics raws li lub xeev tom qab tau rhuab.
Thermosetting yas yog yas uas muaj cov khoom ntawm cua sov, kho thiab insoluble, tsis yaj. Cov yas no tsuas tuaj yeem tsim ib zaug.
Feem ntau muaj kev ua tau zoo hluav taws xob zoo heev, thiab tuaj yeem tiv thaiv kub siab.
Tab sis nws qhov tsis zoo tseem ceeb yog tias kev ua haujlwm nrawm yog qeeb thiab cov khoom siv rov ua dua tshiab yog qhov nyuaj.
Qee cov thermosetting drastics suav nrog:
Phenol yas (rau lauj kaub lauj kaub);
Melamine (siv hauv cov laminates yas);
Epoxy Resin (rau cov nplaum);
Unsaturated polyester (rau hull);
Vinyl lipids (siv hauv lub cev tsheb);
Polyurethane (rau cov soles thiab foams).
Thermoplastic yog ib hom yas uas yog malleable ntawm ib tug kub, solergifies tom qab txias, thiab tuaj yeem rov ua cov txheej txheem.
Yog li ntawd, thermoplastics tuaj yeem rov ua dua tshiab.
Cov ntaub ntawv no tuaj yeem siv tau txog xya zaus ua ntej lawv qhov kev ua tau zoo nthuav tawm.
3. Yas Ua thiab Cov Qauv Txuj Ci
Muaj ntau cov txheej txheem kev ua los ua kom cov plastics los ntawm cov khoom ua tiav rau hauv ntau cov khoom tiav, cov hauv qab no feem ntau siv:
Kev txhaj tshuaj molding (cov txheej txheem kev ua tshaj plaws);
Tshuab moulding (ua cov hwj thiab hollow);
Extrusion Molding (kev lag luam ntau lawm, kav dej, profiles, cable);
Tshuab zaj duab xis sib haum (ua cov hnab yas);
Dov moulding (manufacturing loj hollow cov khoom lag luam, xws li ntim, buoys);
Nqus Plua Plav Twv (Kev Ntim Khoom Siv, Tiv Thaiv Lub thawv)
4. Cov khoom siv thiab kev siv ntawm cov huab cua
Cov plastics tuaj yeem faib ua kom dav dav dav, engineering plastics, tshwj xeeb engineering plastics thiab lwm yam.
Cov yas yas: yog hais txog cov yas ntim ntau hauv peb lub neej, ntau tshaj ntawm ntau yam ntawm cov yas yas tsuas yog suav nrog: PE, pvc, PS, ABS thiab lwm yam.
Engineering plastics: Plastics siv ua cov ntaub ntawv engineering thiab hloov rau cov hlau hauv kev ua cov tshuab, thiab lwm yam.
Kev ua tshuab ua kom haum rau kev ua tau zoo tshaj plaws muaj kev ua tau zoo, muaj zog siv hluav taws xob, thiab siv hluav taws xob zoo, thiab tuaj yeem siv hauv cov khoom siv hnyav thiab ib puag ncig lub cev tau ntev.
Tam sim no, tsib tus neeg ua haujlwm plastics :) PBT (PolybutyleneY Terephtherhy), pbo (polybutyl ether) thiab prophyryl ether) thiab pbophenylej) yog siv dav hauv ntau thaj teb tom qab hloov kho.
Kev ua tau zoo tshwj xeeb rau kev ua haujlwm: Tshwj xeeb engineering concineation nrog cov kev ua tau zoo thiab kev ua tau zoo, thiab kev siv ntev dua rau saum toj 150 ℃. Mas siv rau hauv cov khoom siv hluav taws xob, hluav taws xob, kev lag luam tshwj xeeb thiab lwm cov liaj teb siab.
Muaj cov polyphenylene sulfide (pps), polyimide (Peet ether etene ketene (Peek), ua kua Crystal polymer (PPA), thiab lwm yam), thiab lwm yam.
5. Dab tsi yog biodegradable yas?
Cov plastics Peb feem ntau siv yog ntev-saw Macromolecules uas yog polymerized heev thiab nyuaj rau disassemble ib puag ncig ntuj. Kev hlawv lossis av pov tseg tuaj yeem ua rau muaj kev phom sij ntau dua, yog li cov neeg saib kom muaj kev saib tsis taus kom muaj kev nyuaj siab ib puag ncig.
Degradable plastics yog muab faib ua cov ntaub ntawv uas muaj cov ntaub ntawv thiab biodegradable plastics.
Photodegradable plastics: nyob rau hauv qhov kev txiav txim ntawm ulaviolet lub teeb thiab cua sov, cov qauv yas hauv cov qauv yas tawg, yog li ua tiav lub hom phiaj ntawm kev ua tsis raws cai.
Biodegradable plastics: nyob rau hauv cov xwm txheej ntuj, microorganisms hauv xwm sib tw ntev ntawm cov kab tsuag ntev, thiab metabolized los ntawm cov kab mob yas rau hauv dej thiab carbon dioxide.
Nyob rau tam sim no, degradable plastics nrog kev ua lag luam zoo suav nrog PLA, PBAT, thiab lwm yam
Lub sij hawm ncua: 12-11-21