Cov yas yog tag nrho cov ntaub ntawv polymer, thiab cov ntaub ntawv polymer yuav inevitably deteriorate nyob rau hauv cov txheej txheem ntawm synthesis, tsheb thauj mus los, cia, ua thiab zaum kawg cov khoom, thiab lub cev Performance index yuav poob, uas yog, kev laus. Qhov tshwm sim ntawm kev laus xws li yellowing, poob ntawm luster, tawg ntawm qhov chaw ntawm cov khoom, hmoov (polypropylene), thiab ntau yam khoom siv xws li tensile zog, cuam tshuam lub zog, extramural zog thiab elongation ntawm tawg yog zoo heev txo, yog li poob. Siv kev ua haujlwm.
Los ntawm kev pom tshuaj, txawm tias cov khoom siv polymer yog ntuj lossis hluavtaws, vim nws cov qauv macro molecular saw, qee qhov ntawm nws muaj qee qhov tsis muaj zog, thiab cov nyiaj tsis muaj zog no dhau los ua cov tshuaj tiv thaiv. Kev laus ntawm cov yas woven raw cov ntaub ntawv thiab cov khoom yog tsis muaj dab tsi ntau tshaj li ib tug tshuaj tiv thaiv pib los ntawm qaug zog bonds nyob rau hauv tej yam ntuj tso tej yam kev mob, xws li oxidation cov tshuaj tiv thaiv, thiab yog li ib tug series ntawm lwm yam tshuaj. Raws li qhov tshwm sim, cov qauv molecular ntawm cov khoom siv polymer raug hloov pauv, xws li saw abscission, txheeb ze molecular hnyav txo lossis hla kev sib txuas, kom qhov kev ua tau zoo ntawm cov khoom tsis zoo thiab siv tsis tau.
Muaj ntau yam kev laus ntawm cov yas woven raw cov ntaub ntawv thiab cov khoom, xws li tshav kub, ultraviolet lub teeb, cua, Frost, daus thiab los nag, thiab lwm yam. Muaj ntau yam aging rau yas woven cov khoom, xws li lub sij hawm ntev load, stacking extrusion quab yuam, thiab ntau yam khoom siv sab nraud. , electrostatic quab yuam thiab sab hauv corrosion.
Kev laus tshaj plaws tuaj yeem muab faib ua ob pawg: thermal oxidative laus thiab yees duab oxidative laus. Nrog rau qhov kub thiab txias, nrog rau muaj cov pa oxygen hauv huab cua, muaj niam-oxidative laus; nyob rau hauv lub xub ntiag ntawm lub teeb, uas yog, ultraviolet hluav taws xob, nrog rau re-airing nyob rau hauv cov huab cua, muaj yees duab-oxidative laus, nws yog precisely cov yas woven raw cov ntaub ntawv uas tsim los ntawm lub Hoobkas, Thaum lub sij hawm tag nrho cov txheej txheem ntawm cia thiab thauj, kev ua thiab molding, thiab siv, feem ntau raug yog tshav kub, oxygen thiab hnub ci (ultraviolet rays) nyob rau hauv ib puag ncig.
Cov tuam txhab lag luam yuav tsum nco ntsoov tias cov granules ntawm cov ntaub ntawv yas-woven polypropylene raw khoom tau ntxiv nrog tus neeg sawv cev pab pawg thaum lub sijhawm tsim khoom. Cov chaw tsim khoom ua kom ntseeg tau tias tsis muaj kev laus loj yuav tshwm sim thaum lub sijhawm tsim khoom, khaws cia thiab kev thauj mus los. Txawm li cas los xij, cov hmoov tsis ntxiv cov tshuaj tiv thaiv kev laus, thiab cov lag luam yas weaving yuav tsum tsis txhob khaws cia ntev heev, vim tias txheej txheej ntawm cov hmoov yuav muaj hnub nyoog tiag tiag nrog lub sijhawm khaws cia. , polyethylene raw cov ntaub ntawv siv nyob rau hauv yas weaving feem ntau tsis tas yuav xav txog kev cia thiab kev thauj mus los aging.