LDPE Zaj Duab Xis (16 Duab): Nws Yog Dab Tsi? Kev Tsim Tawm Ntawm LDPE Lub Tes Tsho Thiab Ib Nrab Lub Tes Tsho, Yam Ntxwv Ntawm Zaj Duab Xis Thib Ob, GOST

2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-18 12:13

Polyethylene yog cov khoom siv xav tau tshaj plaws los ntawm cov yas, tau nkag mus txhua hnub hauv lub neej ntawm txhua tus neeg. Cov yeeb yaj kiab ua los ntawm kev kub siab polyethylene (LDPE, LDPE) yog qhov tsim nyog xav tau. Cov khoom los ntawm cov khoom siv no tuaj yeem pom nyob txhua qhov chaw.

Nws yog dab tsi?

LDPE zaj duab xis yog cov khoom siv hluavtaws polymer tau txais los ntawm qhov siab ntawm 160 txog 210 MPa (los ntawm kev siv cov tshuaj polymerization radical). Nws muaj:

• tsawg ntom nti thiab pob tshab;
• tsis kam rau cov khoom puas;
• yooj thiab elasticity.

Cov txheej txheem polymerization tau ua tiav raws li GOST 16336-93 hauv lub tshuab hluav taws xob autoclave lossis tubular reactor.

Pros thiab cons

Zaj yeeb yaj kiab muaj tus lej zoo

• Pob tshab Lub hauv paus no, cov khoom siv piv rau iav. Yog li ntawd, nws yog nrov heev ntawm cov neeg nyob rau lub caij ntuj sov uas cog zaub hauv tsev cog khoom thiab tsev cog khoom.
• Hws noo kuj . Cov khoom lag luam rau lub hom phiaj kev lag luam thiab tsev neeg, ua los ntawm cov khoom siv polymeric, tsis txhob tso dej kom dhau mus. LDPE zaj duab xis kuj tsis muaj qhov tshwj xeeb. Yog li ntawd, txhua yam uas tau ntim lossis npog nrog nws yuav raug tiv thaiv kom zoo los ntawm qhov tsis zoo ntawm cov dej noo.
• Rhuav lub zog . Ua tiav los ntawm cov yas zoo ntawm cov khoom. Thaum ncab mus rau qee qhov txiaj ntsig, zaj duab xis tsis tawg, uas ua rau nws muaj peev xwm ntim cov khoom lag luam hauv ob peb txheej nrog nro, tsim kom muaj lub pluaj tiv thaiv tau zoo.
• Ib puag ncig phooj ywg thiab nyab xeeb . Los ntawm nws cov qauv, zaj duab xis tsis muaj tshuaj lom neeg; nws tuaj yeem siv rau kev nyab xeeb ntim khoom noj, tshuaj, tshuaj lom neeg hauv tsev, chiv, thiab lwm yam.
• Yooj yim ntawm kev ua . Txij li thaum muaj peev xwm siv LDPE zaj duab xis dua tom qab ua tiav, qhov no txo qis tus nqi ntawm cov khoom siv raw.
• Multifunctionality . Cov khoom tuaj yeem siv tau hauv ntau yam kev lag luam, kev tsim kho, kev ua liaj ua teb, kev lag luam.
• Tus nqi qis .
• Tus txheeb ze ruaj ntseg kom hloov pauv hauv qhov kub thiab txias.

Cons ntawm polyethylene:

• tsis kam ua kom muaj roj, uas ua rau nws tsis haum rau ntim cov khoom lag luam khoom noj uas tsis zoo thaum lub sijhawm txheej txheem oxidation;
• kis hluav taws xob ultraviolet (txij li cov khoom siv pob tshab);
• tsis muaj peev xwm tiv taus qhov kub siab (ntawm 100 ° C, polyethylene yaj);
• teeb meem kev ua tau zoo kuj tsawg;
• rhiab heev rau nitric acid thiab chlorine.

Saib

Zaj duab xis polyethylene tau muab faib ua 3 hom

1. LDPE zaj duab xis los ntawm thawj cov ntaub ntawv raw . Ntawd yog, rau kev tsim cov khoom siv, cov khoom siv raw tau siv yav tas los tsis tau ua tiav rau txhua yam khoom kawg. Hom polyethylene no yog siv hauv ntim khoom noj thiab lwm thaj chaw.
2. Secondary LDPE . Rau nws cov khoom lag luam, cov khoom siv raw khoom siv thib ob yog siv. Hom yeeb yaj kiab no yog txuj ci thiab tau xyaum nyob txhua qhov chaw tshwj tsis yog hauv kev lag luam khoom noj.
3. Dub LDPE zaj duab xis . Kuj txiav txim siab cov khoom siv. Cov yeeb yaj kiab dub nrog cov ntxhiab tsw tshwj xeeb. Lwm lub npe yog kev tsim kho polyethylene. Nws tau xyaum ua hauv kev tsim cov kav dej yas thiab ntim khoom. Nws yog qhov zoo los npog lub txaj nrog cov cog nrog cov yeeb yaj kiab no kom ua kom muaj hnub ci sov nyob rau lub caij nplooj ntoo hlav thaum ntxov, ntxiv rau tiv thaiv cov nroj.

Hom thib ob thiab thib peb ntawm cov yeeb yaj kiab polyethylene yog tus yam ntxwv tus nqi pheej yig dua li cov ntaub ntawv los ntawm thawj cov ntaub ntawv raw.

Cov yeeb yaj kiab siab tau muab cais ua ntau tus lej. Piv txwv, tsom mus rau lub hom phiaj ntawm cov khoom siv: ntim khoom lossis rau kev xav tau kev ua liaj ua teb. Ntim zaj duab xis, nyeg, tau muab faib ua cov khoom siv thiab khoom noj. Cov yeeb yaj kiab dub kuj tseem haum rau ntim khoom noj, tab sis txij li nws tau ntom thiab muaj zog dua li zaub mov, nws tsis muaj peev xwm siv nws hauv lub neej txhua hnub.

Ib qho ntxiv, kev faib cov yeeb yaj kiab LDPE los ntawm daim ntawv ntawm kev tsim khoom kuj tau xyaum

• Tsho - polyethylene yeeb nkab, mob rau ntawm yob. Qee zaum muaj cov quav (quav) raws cov ntug ntawm cov khoom lag luam. Lawv yog lub hauv paus rau kev tsim cov hnab, ntxiv rau ntim cov khoom zoo sib xws "hnyuv ntxwm".
• Canvas - ib txheej ntawm LDPE tsis muaj quav lossis nqaws.
• Ib nrab-tes tsho - lub tes tsho txiav los ntawm ib sab. Hauv daim ntawv nthuav dav, nws tau siv ua daim ntaub.

Cov ntawv thov

Cov yeeb yaj kiab ua los ntawm cov tshuab ua kom muaj zog siab pib siv los ua cov khoom ntim khoom txog 50-60 xyoo dhau los. Niaj hnub no nws tau siv ob qho tib si rau ntim khoom noj thiab cov khoom lag luam uas tsis yog khoom noj thiab ua rau lub hnab . Cov khoom siv no ua rau nws muaj peev xwm khaws tau kev ncaj ncees thiab ua kom lub neej txee ntev ntawm cov khoom, tiv thaiv lawv los ntawm kev ntub, av thiab ntxhiab tsw txawv teb chaws. Hnab ua los ntawm cov yeeb yaj kiab no tiv taus kom khov.

Cov khoom noj tau muab tso rau hauv hnab polyethylene rau khaws cia . Hauv ntau qhov xwm txheej, ncab zaj duab xis tau siv rau lub hom phiaj no. Shrink film tau siv dav hauv kev ntim cov khoom hauv qab no: fwj thiab poom, ntawv xov xwm thiab ntawv xov xwm, ntawv sau thiab khoom siv hauv tsev. Nws muaj peev xwm ntim txawm tias cov khoom loj heev hauv cov yeeb yaj kiab ntsws, uas yooj yim heev rau lawv txoj kev thauj mus los.

Ntawm lub hnab ntim me me, koj tuaj yeem luam cov cim lag luam thiab txhua yam khoom lag luam tshaj tawm.

Thickened LDPE yog siv rau ntim cov khoom siv hauv tsev (piv txwv li, thaiv cov cib thiab cladding, rwb thaiv tsev cua sov, cov laug cam). Thaum ua tiav kev tsim kho thiab kho ua haujlwm, daim ntaub thaiv zaj duab xis tau siv los nkaum cov rooj tog thiab khoom siv. Kev tsim cov khib nyiab yuav tsum tau khov, siab-siab polymer hnab uas yog kua muag-tiv taus thiab txiav-resistant.

Hauv kev ua liaj ua teb, LDPE zaj duab xis tau txais qhov xav tau tshwj xeeb vim nws cov cuab yeej tsis tso dej thiab dej hla mus . Cov tsev cog khoom zoo tau tsim los ntawm nws, uas yog qhov pheej yig dua li lawv cov iav qauv. Hauv qab thiab sab saum toj ntawm cov av thiab cov txheej txheem hauv av rau fermentation thiab khaws cia cov kua muaj kua (piv txwv li, lub qhov txhab) tau npog nrog zaj duab xis canvas txhawm rau ua kom nrawm dua lub voj voog fermentation thiab khaws cov av.

Qhov ua tau zoo ntawm kev siv cov ntaub ntawv no tseem tau sau tseg hauv kev ua theem thib ob ntawm cov ntaub ntawv raw: zaj duab xis yaj tsis tas siv zog ntau, muaj qhov viscosity siab thiab zoo weldability.