Nkag siab PVA: Yuav ua li cas qib ntawm polymerization (DP) thiab℃ntawm hydrolysis (DH) kev txiav txim siab thiab kev txiav txim siab

Lub hauv paus rau phau ntawv

Los ntawm kuv kev ua haujlwm ua haujlwm nrog cov neeg yuav khoom thiab cov ntawv sau polyvinyl, xaiv txoj kev muaj cai polyvinyl yog kom tsis txhob muaj nqi ntau dua thiab ntau lawm qeeb.

Hauv tsab xov xwm no kuv yuav piav tias yog vim li cas Pva'sQib ntawm Polymerization (DP)thiabQib ntawm hydrolysis (DH)Matter, yuav ua li cas cov khoom hloov pauv tau, thiab cov lus qhia tswv yim rau kev xaiv thiab kev ntshuam pva rau ntau cov ntawv thov. Qhov no muaj feem cuam tshuam rau cov neeg yuav khoom los ntawm Tuam Tshoj lossis cov chaw xaiv thoob ntiaj teb, qhov twg cov kev xaiv qib kawm thiab kev sib txawv.

PVA yog dab tsi thiab vim li cas nws tseem ceeb rau kev lag luam

Cawv Roj (PVA) yog dej - soluble hluav taws xob, dej}} soluble ntim, thiab cov kws tshaj lij kho qhov muag thiab hluav taws xob. Vim tias PVA qhov kev ua tau zoo yog li rhiab molecular qauv, solubility hauv dp lossis DH tau muaj peev xwm cuam tshuam nrog cov khoom siv lossis cov khoom siv ntxiv. Rau cov neeg ua haujlwm thiab cov tuam txhab tsim khoom, xaiv txoj cai ua ke ntawm DP thiab DH kev txiav txim siab cov txheej txheem, cov khoom lag luam tsim nyog, thiab cov khoom lag luam durability, thiab cov khoom lag luam durability, thiab cov khoom lag luam durability, thiab cov khoom txaus.

Yuav ua li cas DP thiab dl cuam cuam tshuam pva - qhov sib txawv tseem ceeb

Qib ntawm Polymerization (DP)

Nws yog dab tsi:DP hais txog qhov nruab nrab ntev ntawm polymer chains.

Qhov cuam tshuam:Ntau Dua Dp=ntev cov saw hlau → ntau dua lub zog, zoo dua zaj duab xis- Txoj kev muaj peev xwm, thiab txhim kho kev muaj peev xwm, thiab txhim kho kev muaj peev xwm. Txo DP=beX is best viscosity, qhov yooj yim ua (kev sib cais thiab txheej) tab sis txo cov tshuab ua kom muaj zog.

Qib ntawm hydrolysis (DH)

Nws yog dab tsi:DH ntsuas ntsuas pes tsawg tus pab pawg tau hloov pauv mus rau cov pab pawg hydroxyl (qhia raws li feem pua).

Qhov cuam tshuam:Siab DH (piv txwv li, 98-99%) → Ntau Cov Pab Pawg Hydroxyl thiab cua sov, txo cov dej solubility thiab ntau dua rigidity. Ib nrab hydrolyzed PVA (piv txwv li, ~ 88-89% DH) → ntau soluble, qis dua crystallinity, ntau dua kev sib cais thiab rov qab xaus; Feem ntau zoo dua ruaj khov rau cov khoom zoo li phosphorescence siv hauv cov ntawv teev tshwj xeeb.

Tswv yim lag luam - Offs

Solubility vs. zog:Partially hydrolyzed PVA dissolves faster and is easier to process but has lower mechanical strength than fully hydrolyzed grades.

Ntxiv kev sib txuas lus:Ntau Dua DH txo qhov dawb ntim dawb thiab void loj hauv cov yas ua ke thiab cov roj txuas ntxiv nrog kev cuam tshuam thiab ntev}}} lub sij hawm termiabe.

Ua:High - dp, siab}} dhy lub zog thiab ntau dua rov ua kom muaj zog thiab zoo, kho qhov muag).

-} Hais txog cov lus: DP & DH

Pom zoo PVA qib los ntawm daim ntawv thov (piav qhia)

Kev Lag Luam Kev Lag Luam & Cov Lus Qhia Buyer

Xyuas cov ntawv pov thawj thiab cov ntaub ntawv:Nco ntsoov thov cov ntawv pov thawj ISO, MSDS, Kev Ntsuam Xyuas (Daim Ntawv Pov Thawj DP thiab DH muaj nuj nqis}}

Nug rau Batch Coas thiab qauv:Kev ntsuas me me-} batch ntsuam xyuas pab kom zoo meej viscosity, tus cwj pwm sib txawv thiab cov yeeb yaj kiab ua ntej muab cov xaj xaj loj.

Qhia meej cov rooj sib tham qib:Cov khoom sib txawv yuav cim tau qhab nia sib txawv ..- Paub tseeb cov DP / DH tus nqi ntau dua li kev vam khom rau cov npe kawm.

Saib rau noo noo thiab cia:PVA yog hygroscopic; Xyuas cov ntim (cov hnab multilayer, desiccant) thiab cov lus pom zoo cia kom tsis txhob muaj kev hloov kho zoo thaum lub sijhawm xa khoom.

Zam kev ntxiab:Tsis txhob yuav ib leeg ntawm tus nqi - butter {{1} {1}-}}}}}}}}}}}}}}}} Tus nqi tsis paub dp / dh ua rau compulation ua tsis tiav. Kuj tseem ceev faj ntawm cov ntawv tsis tiav lossis cov coas uas tsis muaj kev sim DH / DP qhov kev xeem.

Xaus & hu rau kev nqis tes ua

Xaiv lub vev xaib PVA yog yog qhov sib npaug ntawm solubility / cov txheej txheem thiab cov kev xav tau / durability. Los ntawm kev tsom mus rauQib ntawm polymerizationthiabQib ntawm hydrolysis- Thiab pom zoo cov txiaj ntsig nrog cov ntaub ntawv sim thiab khoom xa khoom tuaj yeem txo cov khoom lag luam uas muaj ntau lawm.

Ntawm Sinoright, peb tau siv dhau ib xyoo caum pab cov neeg yuav khoom hauv 80+ lub teb chaws. Peb tuaj yeem pab koj xaiv PVA PVA qib, muab cov batch thiab cov qauv rau kev sim, thiab kev txhawb nqa logistics thiab ua raws rau kev ntshuam. Yog tias koj xav tau cov lus pom zoo kawm qib siab lossis cov lus hais sib tw,Hu rau Comeorightniaj hnub no-}} Peb yuav taug kev los ntawm koj cov ntawv thov yuav tsum tau ua thiab muab cov kev txhawb nqa koj yuav tsum tau tsiv los ntawm kev tsim khoom rau kev tsim khoom.