Ntim sealing thiab kub ntim ntaub ntawv muaj raws li hauv qab no;

1. Ntim txheej txheem ntim txheej txheem

Cov txheej txheem ntawm kev ntim khoom ntim suav nrog kev sib khi kub, txias txias, nplaum nplaum, thiab lwm yam. Thaum tshav kub sealing hais txog kev siv cov thermoplastic sab hauv txheej txheej hauv cov qauv txheej txheem multilayer, uas ua kom cov khoom sib khi thaum cua sov, thiab solidifies thaum lub qhov cua kub yog muab tshem tawm. Thaum tshav kub kub sealing plastics, txheej thiab kub yaj yog feem ntau siv cov khoom siv ua tshav kub sealing. Kev khi txias yog hais txog nws tuaj yeem sib khi los ntawm nias tsis muaj cua sov. Feem ntau qhov txias txias ntim txheej tiv thaiv yog ntug txheej thov rau ntawm ntug ntawm lub hnab ntim khoom. Cov nplaum nplaum tsis tshua muaj siv hauv ntau txheej txheej ntim khoom lag luam, tsuas yog siv rau cov khoom ntim nrog cov ntawv ntim.

2. Thaum tshav kub kub sealing khoom

(1) HmoobPolyethylene (PE) yog ib hom milky dawb, translucent thiab opaque waxy solid. Nws yuav luag tsis qab, tsis zoo thiab ntais tshaj dej. PE macromolecular saw muaj qhov hloov tau yooj yim thiab yog qhov yooj yim rau crystallize. Nws yog cov khoom siv tawv ntawm chav tsev kub. Raws li cov khoom ntim, cov kev cuam tshuam tseem ceeb ntawm PE yog cov huab cua tsis zoo, qhov siab permeability roj thiab organic pa, tsis tshua muaj zog thiab ua haujlwm kub; nws yog qhov yooj yim rau degraded los ntawm lub teeb, cua sov thiab ncej, yog li cov tshuaj tiv thaiv antioxidant thiab lub teeb thiab kub lub zog ntau zaus ntxiv rau cov khoom PE tiv thaiv kev laus; PE muaj cov teeb meem tsis zoo ib puag ncig ntawm kev tawg, thiab tsis tiv taus qhov xeb ntawm qhov muaj zog h2s04, HNO3 thiab nws cov oxidant, thiab yuav yaig los ntawm qee qhov aliphatic hydrocarbons lossis chlorinated hydrocarbons thaum rhaub; kev ua tiav luam ntawv ntawm PE tsis zoo, thiab cov nplaim npoo tsis-polar, yog li kev kho mob corona yuav tsum tau nqa tawm ua ntej luam ntawv thiab qhuav daim ntawv cog lus txhawm rau txhim kho kev sib txuam thiab qhuav txuas ntawm luam ntawv number case.

PE siv rau thaum tshav kub kub sealing ntim feem ntau suav nrog:
① tsis ntom ntom polyethylene (LDPE), tseem hu ua polyethylene siab;
Density high ntom polyethylene (HI) PE, tseem hu ua polyethylene kev kub siab;
③ nruab nrab ntom polyethylene (nu) PE :); linear qis ntom polyethylene (LLDPE);
Eth metallocene catalyzed polyethylene.

(2) Cov (2)Cov khoom ntawm cov nrum polypropylene zaj duab xis (CPP) siv rau cov khoom siv cua sov sealing me ntsis sib txawv los ntawm cov biaxially oriented polypropylene vim nws cov txheej txheem sib txawv ntau lawm. Qhov zoo thiab qhov tsis zoo ntawm CPP tau pom nyob rau hauv cov ntsiab lus muaj feem ntawm "polypropylene".

(3) PVC (sau luv luv li PVC) yog xim tsis muaj xim, pob tshab thiab tawv nrog lub cev muaj zog molecular polarity thiab lub zog intermolecular muaj zog, yog li nws muaj cov tawv zoo thiab tawv yas lub raj mis.

PVC pheej yig dua thiab siv tau ntau yam. Nws tuaj yeem ua rau lub thawv ntim cov ntim nruj, pob tshab thiab pob tshab ntim zaj duab xis thiab ua npuas yas yas cushioning cov ntaub ntawv. Vim tias nws cov tshuaj lom toxicity thiab decomposition corrosion, nws txoj kev noj tau tsawg zuj zus thiab maj mam hloov los ntawm lwm cov ntaub ntawv.

(4) EVA (ethylene vinyl acetate copolymer) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) ( EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (eva-eva) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA. EVA) yog cov translucent lossis me ntsis milky dawb khoom npaj. los ntawm copolymerization ntawm ethylene thiab vinylacetic acid vinegar. Nws cov khoom hloov nrog cov ntsiab lus ntawm ob lub monomers. Yog li, thaum xaiv tus qauv ntawm EVA, nws yuav tsum txiav txim siab raws li kev siv, thiab tuaj yeem siv ua yas, kub yaj nplaum thiab txheej Cov.
EVA yog dav siv raws li sab hauv txheej ntawm cov zaj duab xis vim nws zoo elasticity thiab tsis kub lub zog sealing. Nws yog siv hauv cov nplaum, cov xim ib txheej, txheej ib txheej, cable rwb thaiv tsev thiab xim thauj cov xim nrog nws cov adhesion zoo (zoo los yog qee qhov drillability uas muaj ntau hom polar thiab tsis-polar).

(5)PVDC (polyvinylidene chloride) PVDC feem ntau yog hais txog tus kws luam ntawv ntawm vinylidene chloride. Cov kua polymer tau los ntawm polymerization muaj siab crystallinity, siab muag (185-200′c) thiab ze rau qhov kev txiav txim siab kub (210-2250). Nws muaj kev tsis sib haum nrog kev siv nruam dav dav, yog li nws tsis yooj yim ua pwm.
PVDC yog cov khoom uas muaj zog thiab pob tshab nrog siab uas muaj crystallinity thiab cov xim daj ntsuab. Nws muaj qhov sib kis tau qis tsawg kawg rau dej nqos roj, roj thiab tsw, thiab muaj cov dej noo zoo tsis kam, huab cua ua kom nruj thiab muaj ntxhiab tsw. Nws yog qhov zoo tshaj plaws qhov tsis pub siv cov khoom siab. Nws tiv taus cov kua qaub, alkali thiab ntau cov kuab tshuaj, roj resistant, refractory thiab tus kheej extinguishing.