Kev yuav khoom siv ntim khoom | Yuav ua li cas xaiv cov khoom siv yas zoo

Kev xaiv thiab qhov zoo ntawm cov ntaub ntawv yog qhov tseem ceeb rau kev ua kom zoo ntawm cov hoses, uas yuav cuam tshuam ncaj qha rau kev ua thiab kev siv zaum kawg ntawm cov hoses. Cov ntaub ntawv ntawm cov yas hoses suav nrog polyethylene (rau lub cev raj thiab lub taub hau raj), polypropylene (lub hau raj), masterbatch, barrier resin, luam ntawv number case, varnish, thiab lwm yam. Yog li ntawd, kev xaiv cov ntaub ntawv twg los xij yuav cuam tshuam ncaj qha rau qhov zoo ntawm cov hose. Txawm li cas los xij, kev xaiv cov ntaub ntawv kuj nyob ntawm cov yam xws li kev xav tau kev tu cev, cov khoom thaiv (kev xav tau rau oxygen, dej pa, kev khaws cia tsw qab, thiab lwm yam), thiab kev tiv thaiv tshuaj lom neeg.

Kev xaiv cov kav dej: Ua ntej, cov ntaub ntawv siv yuav tsum ua tau raws li cov qauv kev tu cev, thiab cov tshuaj lom neeg xws li cov hlau hnyav thiab cov neeg sawv cev fluorescent yuav tsum tau tswj hwm hauv qhov ntau uas tau teev tseg. Piv txwv li, rau cov kav dej xa tawm mus rau Tebchaws Meskas, cov polyethylene (PE) thiab polypropylene (PP) siv yuav tsum ua tau raws li US Food and Drug Administration (FDA) tus qauv 21CFR117.1520.

Cov khoom siv thaiv kev ua haujlwm: Yog tias cov ntsiab lus ntawm cov khoom ntim ntawm cov tuam txhab tshuaj txhua hnub yog qee cov khoom uas rhiab heev rau oxygen (xws li qee cov tshuaj pleev ib ce dawb) lossis cov tshuaj tsw qab yog volatile heev (xws li cov roj tseem ceeb lossis qee cov roj, cov kua qaub, ntsev thiab lwm yam tshuaj corrosive), tsib-txheej co-extruded raj yuav tsum tau siv lub sijhawm no. Vim tias qhov oxygen permeability ntawm tsib-txheej co-extruded raj (polyethylene / nplaum resin / EVOH / nplaum resin / polyethylene) yog 0.2-1.2 units, thaum qhov oxygen permeability ntawm cov polyethylene ib-txheej raj yog 150-300 units. Hauv ib lub sijhawm, qhov hnyav poob ntawm cov raj co-extruded uas muaj ethanol yog kaum ob npaug qis dua li ntawm ib-txheej raj. Tsis tas li ntawd, EVOH yog ethylene-vinyl cawv copolymer nrog cov khoom thaiv zoo heev thiab khaws cia tsw qab (qhov tuab ntawm 15-20 microns yog qhov zoo tshaj plaws).

Cov khoom siv tawv: Cov tuam txhab tshuaj lom neeg txhua hnub muaj cov kev cai sib txawv rau qhov tawv ntawm cov kav dej, yog li yuav ua li cas kom tau qhov tawv xav tau? Cov polyethylene feem ntau siv hauv cov kav dej yog feem ntau yog cov polyethylene qis-density, polyethylene siab-density, thiab polyethylene qis-density. Ntawm lawv, qhov tawv ntawm cov polyethylene siab-density zoo dua li cov polyethylene qis-density, yog li qhov tawv xav tau tuaj yeem ua tiav los ntawm kev kho qhov sib piv ntawm cov polyethylene siab-density / polyethylene qis-density.

Cov khoom siv tiv taus tshuaj lom neeg: Polyethylene uas muaj qhov ceev ceev muaj kev tiv taus tshuaj lom neeg zoo dua li polyethylene uas muaj qhov ceev ceev tsawg.

Kev tiv thaiv huab cua ntawm cov ntaub ntawv: Txhawm rau tswj kev ua haujlwm luv luv lossis ntev ntawm lub hose, cov yam xws li qhov tsos, kev tiv thaiv siab / kev poob qis, lub zog sealing, kev tiv thaiv kev tawg ntawm ib puag ncig (ESCR tus nqi), tsw qab thiab kev poob ntawm cov khoom xyaw nquag yuav tsum tau xav txog.

Kev xaiv masterbatch: Masterbatch ua lub luag haujlwm tseem ceeb hauv kev tswj xyuas qhov zoo ntawm cov yeeb nkab. Yog li ntawd, thaum xaiv masterbatch, lub tuam txhab siv yuav tsum xav txog seb nws puas muaj kev sib kis zoo, kev lim dej thiab kev ruaj khov thermal, kev tiv thaiv huab cua thiab kev tiv thaiv khoom. Ntawm lawv, qhov kev tiv thaiv khoom ntawm masterbatch yog qhov tseem ceeb thaum siv cov yeeb nkab. Yog tias masterbatch tsis sib xws nrog cov khoom, xim ntawm masterbatch yuav tsiv mus rau cov khoom, thiab cov txiaj ntsig yog qhov loj heev. Yog li ntawd, cov tuam txhab tshuaj lom neeg txhua hnub yuav tsum sim qhov ruaj khov ntawm cov khoom tshiab thiab cov yeeb nkab (kev sim ceev hauv qab cov xwm txheej tshwj xeeb).

Cov hom varnish thiab lawv cov yam ntxwv: Cov varnish siv rau hauv cov hose yog muab faib ua hom UV thiab hom cua sov ziab, thiab tuaj yeem muab faib ua qhov chaw ci thiab qhov chaw matte hauv cov tsos. Varnish tsis tsuas yog muab cov teebmeem pom zoo nkauj xwb, tab sis kuj tiv thaiv cov ntsiab lus thiab muaj qee qhov cuam tshuam ntawm kev thaiv cov pa oxygen, dej pa thiab tsw qab. Feem ntau hais lus, cov varnish ziab cua sov muaj qhov nplaum zoo rau tom qab kub stamping thiab silk-screen luam ntawv, thaum UV varnish muaj qhov ci zoo dua. Cov tuam txhab tshuaj lom neeg txhua hnub tuaj yeem xaiv cov varnish tsim nyog raws li cov yam ntxwv ntawm lawv cov khoom. Tsis tas li ntawd, cov varnish kho yuav tsum muaj qhov nplaum zoo, qhov chaw du tsis muaj pitting, tiv taus folding, tiv taus hnav, tiv taus corrosion, thiab tsis muaj discoloration thaum khaws cia.

Cov Kev Cai rau lub cev raj/lub taub hau raj: 1. Qhov chaw ntawm lub cev raj yuav tsum du, tsis muaj kab txaij, khawb, ncab, lossis kev hloov pauv ntawm lub cev. Lub cev raj yuav tsum ncaj thiab tsis khoov. Lub phab ntsa raj tuab yuav tsum sib npaug. Lub phab ntsa raj tuab, qhov ntev ntawm lub raj, thiab qhov ntev ntawm lub raj yuav tsum nyob hauv qhov ntau thiab tsawg uas tau teev tseg;

2. Lub taub hau raj thiab lub cev raj ntawm lub hose yuav tsum txuas ruaj khov, txoj kab txuas yuav tsum huv si thiab zoo nkauj, thiab qhov dav yuav tsum sib npaug. Lub taub hau raj yuav tsum tsis txhob nkhaus tom qab txuas; 3. Lub taub hau raj thiab lub hau raj yuav tsum sib phim zoo, ntsia hlau rau hauv thiab tawm du, thiab yuav tsum tsis txhob muaj kev swb hauv qhov ntau ntawm lub zog teev tseg, thiab yuav tsum tsis txhob muaj dej lossis cua xau ntawm lub raj thiab lub hau;

Cov Kev Cai Luam Ntawv: Kev ua cov hose feem ntau siv lithographic offset printing (OFFSET), thiab feem ntau ntawm cov kua siv yog UV-qhuav, uas feem ntau xav tau kev nplaum zoo thiab tiv taus kev hloov pauv. Cov xim luam ntawv yuav tsum nyob hauv qhov tob teev tseg, qhov chaw overprint yuav tsum raug, qhov sib txawv yuav tsum nyob hauv 0.2 hli, thiab cov ntawv yuav tsum tiav thiab meej.

Cov Kev Cai rau Cov Hau Yas: Cov hau yas feem ntau yog ua los ntawm polypropylene (PP) txhaj tshuaj molding. Cov hau yas zoo yuav tsum tsis muaj cov kab shrinkage thiab flashing, cov kab pwm du, qhov loj me raug, thiab haum zoo nrog lub taub hau raj. Lawv yuav tsum tsis txhob ua rau muaj kev puas tsuaj rau cov qauv xws li tawg brittle lossis tawg thaum siv ib txwm. Piv txwv li, thaum lub zog qhib nyob hauv qhov ntau, lub hau tig yuav tsum muaj peev xwm tiv taus ntau dua 300 qhov quav yam tsis tawg.