Heerka PVC HPMC
PVCHPMC Hydroxypropyl Methylcellulose waa nooc polymer ah oo leh isticmaalka ugu badan iyo waxqabadka ugu sarreeya dhammaan noocyada cellulose. Waxaa si weyn loogu isticmaalaa qaybaha warshadaha kala duwan iyo nolol maalmeedka. Waxaa had iyo jeer loo yaqaan "MSG warshadaha".
Hydroxypropyl methyl cellulose (HPMC) waa mid ka mid ah kuwa ugu muhiimsan ee kala firdhiya warshadaha polyvinyl chloride (PVC). Inta lagu jiro joojinta polymerization-ka vinyl chloride, waxay yareyn kartaa xiisadda u dhaxaysa VCM iyo biyaha waxayna ka caawin kartaa monomers-ka vinyl chloride (VCM) inay si isku mid ah oo deggan ugu kala firdhiso biyaha; waxay ka hortagtaa dhibcaha VCM inay isku milmaan marxaladda hore ee habka polymerization-ka; waxay ka hortagtaa walxaha polymer inay isku milmaan marxaladda dambe ee habka polymerization-ka. Nidaamka polymerization-ka joojinta, waxay door ka ciyaartaa kala firdhinta iyo ilaalinta Doorka laba-geesoodka ah ee xasilloonida.
Marka la eego polymerization-ka joojinta VCM, dhibcaha polymerization-ka hore iyo walxaha polymer-ka dhexe iyo kuwa dambe ayaa si fudud loogu dari karaa bilowga, sidaa darteed waa in lagu daraa wakiil ilaalin kala firdhisan nidaamka polymerization-ka joojinta VCM. Haddii ay dhacdo habka isku-darka go'an, nooca, dabeecadda iyo xaddiga kala firdhiyuhu waxay noqdeen qodobbada ugu muhiimsan ee lagu xakameeyo astaamaha walxaha PVC.
Qeexitaanka Kiimikada
| HPMC fasalka PVC Faahfaahinta | HPMC60E ( 2910) | HPMC65F( 2906) | HPMC75K( 2208) |
| Heerkulka jel (℃) | 58-64 | 62-68 | 70-90 |
| Methoxy (WT%) | 28.0-30.0 | 27.0-30.0 | 19.0-24.0 |
| Hydroxypropoxy (WT%) | 7.0-12.0 | 4.0-7.5 | 4.0-12.0 |
| Viscosity (cps, 2% Xal) | 3, 5, 6, 15, 50,100, 400,4000, 10000, 40000, 60000, 100000,150000,200000 | ||
Heerka Badeecada:
| PVC darajada HPMC | Viscosity (cps) | Faallo |
| HPMC60E50(E5)0) | 40-60 | HPMC |
| HPMC65F50 (F50) | 40-60 | HPMC |
| HPMC75K100 (K100) | 80-120 | HPMC |
Astaamaha
(1)Heerkulka Polymerization: Heerkulka polymerization-ku wuxuu asal ahaan go'aamiyaa celceliska miisaanka molecular-ka ee PVC, kala firdhiyuhuna asal ahaan wax saameyn ah kuma yeesho miisaanka molecular-ka. Heerkulka jelka ee kala firdhiyuhu wuxuu ka sarreeyaa heerkulka polymerization-ka si loo hubiyo kala firdhinta polymer-ka ee kala firdhiyuhu sameeyo.
(2) Astaamaha walxaha: dhexroorka walxaha, qaab-dhismeedka, daloolada, iyo qaybinta walxaha waa tilmaameyaal muhiim ah oo ku saabsan tayada SPVC, kuwaas oo la xiriira naqshadaynta kicinta/falgaliyaha, saamiga biyaha-ilaa-saliidda polymerization, nidaamka kala firdhinta iyo heerka beddelka kama dambaysta ah ee VCM, kaas oo nidaamka kala firdhintu uu si gaar ah muhiim u yahay.
(3) Walaaqidda: Sida nidaamka kala firdhinta, waxay saameyn weyn ku leedahay tayada SPVC. Sababtoo ah cabbirka dhibcaha VCM ee biyaha ku jira, xawaaraha walaaqidda ayaa kordha cabbirka dhibcahana wuu yaraadaa; marka xawaaraha walaaqidda uu aad u sarreeyo, dhibcaha ayaa isku urura oo saameyn doona walxaha ugu dambeeya.
(4) Nidaamka ilaalinta kala-baxa: Nidaamka ilaalinta wuxuu ilaaliyaa dhibcaha VCM marxaladda hore ee falcelinta si looga fogaado isku-darka; PVC-ga la soo saaray wuxuu ku soo daayaa dhibcaha VCM, nidaamka kala-baxana wuxuu ilaaliyaa isku-darka walxaha la xakameeyey, si loo helo walxaha SPVC ee ugu dambeeya. Nidaamka kala-baxa waxaa loo qaybiyaa nidaamka kala-baxa ugu weyn iyo nidaamka kala-baxa caawiyaha. Kala-baxa ugu weyn wuxuu leeyahay heer sare oo aalkolo ah PVA, HPMC, iwm., kuwaas oo saameeya waxqabadka guud ee SPVC; nidaamka kala-baxa caawiyaha waxaa loo isticmaalaa in lagu hagaajiyo astaamaha qaar ee walxaha SPVC.
(5) Nidaamka kala firdhinta ugu weyn: Waa kuwo biyaha ku milma waxayna xasiliyaan dhibcaha VCM iyagoo yareynaya xiisadda is-dhexgalka ee u dhaxaysa VCM iyo biyaha. Waqtigan xaadirka ah warshadaha SPVC, kala firdhiyeyaasha ugu muhiimsan waa PVA iyo HPMC. HPMC heerka PVC wuxuu leeyahay faa'iidooyinka qiyaasta yar, xasilloonida kulaylka iyo waxqabadka balaastikada wanaagsan ee SPVC. In kasta oo ay qaali tahay, haddana si ballaaran ayaa loo isticmaalaa. HPMC heerka PVC waa wakiil muhiim ah oo ilaalin kala firdhinta ah oo ku jira isku-darka PVC..
Baakad
TBaakadaha caadiga ah waa 25kg/durbaan
20'FCL: 9 tan oo leh balaastiig; 10 tan oo aan balaastiig lahayn.
40'FCL:18tan oo leh palletized;20tan oo aan la rinjiyeyn.
Kaydinta:
Ku kaydi meel qabow oo qalalan oo ka hooseysa 30°C oo ka ilaali qoyaanka iyo cadaadiska, maadaama alaabtu ay tahay mid thermoplastic ah, waqtiga kaydinta waa inaanu ka badnayn 36 bilood.
Qoraallada badbaadada:
Xogta kor ku xusan waxay waafaqsan tahay aqoontayada, laakiin ha ka cafin macaamiisha si taxaddar leh u hubinta dhammaantood isla markiiba marka la helo. Si looga fogaado qaacidooyinka kala duwan iyo walxaha ceeriin ee kala duwan, fadlan samee baaritaan dheeraad ah ka hor intaadan isticmaalin.
Waqtiga boostada: Jan-01-2024