Cov hnab ntim khoom nojbelongs rau ib qho ntawm cov khoom ntim khoom kuaj cov khoom, feem ntau yog ua los ntawm cov ntaub ntawv yas, xws li polyethylene ntim hnab, polypropylene ntim hnab, polyester ntim hnab, polyamide ntim hnab, polyvinylidene chloride ntim hnab, polycarbonate ntim hnab, polyvinyl cawv ntim hnab thiab lwm yam tshiab polymer cov ntaub ntawv ntim hnab.
Nws yog qhov paub zoo tias qee yam tshuaj lom thiab tsis zoo yuav raug tsim tawm thaum lub sijhawm tsim khoom thiab ua cov khoom yas, yog li kev tshuaj xyuas zoo ntawm cov hnab ntim khoom noj nrog rau kev kuaj xyuas kev nyiam huv tau dhau los ua qhov tseem ceeb ntawm kev tswj xyuas kev sib txuas.
1.Kev ntsuam xyuas
Yog vim li ntawdhnab ntim khoom nojyog ncaj qha nyob rau hauv kev sib cuag nrog cov zaub mov uas peb noj txhua hnub, lub hauv paus txheej txheem rau nws soj ntsuam yog hais tias nws yog huv si.
Xws li evaporation residue (acetic acid, ethanol, n-hexane), poov tshuaj permanganate noj, hnyav hlau, thiab kuaj decolorization.Evaporation residue qhia txog qhov ua taucov hnab ntim khoom nojyuav precipitate residues thiab hnyav hlau thaum lawv ntsib vinegar, caw, roj thiab lwm yam kua thaum siv.Cov khoom seem thiab cov hlau hnyav yuav muaj kev cuam tshuam tsis zoo rau tib neeg kev noj qab haus huv.Tsis tas li ntawd, residues yuav cuam tshuam ncaj qha rau xim, aroma, saj thiab lwm yam khoom noj zoo.
Kev soj ntsuam tus qauv raucov hnab ntim khoom noj: cov khoom siv raw thiab cov khoom siv ntxiv rau hauv lub hnab yuav tsum ua raws li cov kev cai hauv lub tebchaws, thiab yuav tsum xyuas kom meej tias tsis muaj tshuaj lom lossis lwm yam kev puas tsuaj rau tib neeg lub cev.
Kev kuaj degradability: hom degradation ntawm cov khoom tuaj yeem muab faib ua hom photodegradation, hom biodegradation thiab ib puag ncig degradation hom.Yog tias qhov kev ua haujlwm degradation zoo, lub hnab yuav tawg, sib txawv thiab degrade los ntawm nws tus kheej raws li kev sib koom ua ke ntawm lub teeb thiab cov kab mob, thiab nws thiaj li ua cov khib nyiab, uas yuav raug lees txais los ntawm ib puag ncig ntuj, kom tsis txhob muaj cov pa phem dawb.
2.Kev soj ntsuam ntsig txog
Ua ntej tshaj plaws, kev sib khi ntawm lub hnab ntim khoom yuav tsum nruj heev, tshwj xeeb tshaj yog raucov hnab ntim khoom nojuas yuav tsum tau muab kaw kom tiav.
Kev soj ntsuam tus qauv ntawmcov hnab ntim khoom nojtseem yuav raug kuaj pom: qhov tsos ntawmcov hnab ntim khoom nojyuav tsum tiaj tus, tsis muaj khawb, scalds, npuas, tawg roj thiab wrinkles thiab lub tshav kub foob yuav tsum tiaj tus thiab tsis muaj cuav foob.Lub membrane yuav tsum tsis muaj kab nrib pleb, pores thiab sib cais ntawm cov txheej txheem.Tsis muaj paug xws li impurities, txawv teb chaws teeb meem thiab roj stains.
Kev tshuaj xyuas tshwj xeeb: nws qhov tshwj xeeb, qhov dav, qhov ntev thiab thickness sib txawv yuav tsum nyob rau hauv qhov ntau yam.
Kev kuaj lub cev thiab cov cuab yeej cuab tam: lub hnab ntim khoom zoo.Kev ntsuas lub cev thiab cov khoom siv kho tshuab suav nrog lub zog tensile thiab elongation thaum tawg.Nws qhia txog lub peev xwm ncab ntawm cov khoom thaum siv.Yog tias lub peev xwm ncab ntawm cov khoom tsis zoo, nws yooj yim rau tawg thiab puas thaum siv.
Q: Yuav txheeb xyuas li casyas ntim hnabtej zaum yuav lom thiab tsis huv?
A: Kev kuaj xyuas los ntawm kev hlawv cov hnab yas:
Cov hnab yas tsis muaj tshuaj lom yog yooj yim rau hlawv.Thaum koj ua tib zoo saib xyuas, koj yuav pom tias cov nplaim xim daj ntawm lub taub thiab cyan ntawm ib feem, thiab nws yuav poob zoo li tswm ciab nrog tsw ntxhiab ntawm paraffin.
Cov hnab yas muaj tshuaj lom tsis yooj yim rau hlawv.Lawv yuav raug tua tam sim ntawd tom qab tawm hauv qhov hluav taws kub.Lub taub yog daj thiab ib feem yog ntsuab.Tom qab hlawv, lawv yuav nyob rau hauv ib lub xeev txhuam.
3.Cov khoom kuaj
Sensory zoo: npuas, wrinkles, kab dej thiab huab, kab txaij, ntses qhov muag thiab nruj blocks, defects defects, impurities, hlwv, nruj, unevenness ntawm lub ntsej muag kawg ntawm zaj duab xis, tshav kub sealing qhov chaw
Qhov txawv txav: lub hnab ntev, qhov dav sib txawv, qhov sib txawv ntawm qhov ntev, kev sib khi thiab lub hnab ntug nrug
Ntsuas cov khoom ntawm lub cev thiab cov khoom siv: tensile force, nominal fracture strain, thermal zog, txoj cai-angle tear load, dart cuam tshuam, tev lub zog, haze, dej vapor kis tau tus mob
Lwm yam khoom: kev ntsuas oxygen barrier kev ua tau zoo, lub hnab siab tiv thaiv kev sim, lub hnab poob kev ua haujlwm, kev kuaj kev tu cev thiab lwm yam.
Post lub sij hawm: Mar-17-2023