IIpayipi le-PVCukwakheka kuqukethe: I-PVC resin, isilungisi somthelela, isinzinzisi, isilungisi esicubungulayo, isicwenga, umbala nesigcobo sangaphandle.
1. PVC inhlaka
Ukuze uthole i-plasticization esheshayo nefanayo, indlela yokumiswa kufanele isetshenziselwe ukukhulula i-resin.
——I-resin esetshenziselwa amapayipi kathayela anezindonga ezimbili kufanele ibe nesisindo esihle samangqamuzana nokuqukethwe ukungcola, ukuze kuncishiswe “iso lenhlanzi” epayipini futhi kugwenywe ukubhidlika kokonakala kwamapayipi kanye nokugqabuka kodonga lwamapayipi.
——I-resin esetshenziselwa amapayipi okuhambisa amanzi kufanele ibe “yezinga lenhlanzeko”, futhi insalela ye-vinyl chloride kunhlaka kufanele ibe phakathi kuka-1 mg/kg.Ukuze uqinisekise ikhwalithi yepayipi futhi unciphise izinga elingalungile, umthombo we-resin kufanele uzinzile.
2. Isiqinisi
Njengamanje, iziqinisi eziyinhloko zokushisa ezisetshenziswa eShayina yilezi: insipho yensimbi, iziqinisi zikasawoti omthofu eziyinhlanganisela, iziqinisi eziyinhlanganisela yomhlaba ezingavamile, neziqinisi zethini lemvelo.
Iziqinisi eziqukethe izinsimbi ezisindayo (ezifana ne-Pb, Ba, Cd) ziyingozi empilweni yomuntu, futhi umthamo walezi ziqinisi ekwakhiweni kwamapayipi okuhambisa amanzi unomkhawulo.Enkambweni ye-extrusion ye-screw eyodwa, umlando wokushisa wezinto ezibonakalayo mude kunalowo wenqubo ye-twin-screw extrusion, futhi inani le-stabilizer ekuqaleni likhuphuka ngaphezu kuka-25%.Izinga lokushisa lekhanda lepayipi likathayela elinezindonga ezimbili liphakeme, impahla ihlala ekhanda isikhathi eside, futhi inani lokuqiniswa kufomula lingaphezu kwefomula yepayipi evamile.
3. Isigcwalisi
Indima yama-filler ukunciphisa izindleko.Zama ukusebenzisa izigcwalisi ezisebenza kahle kakhulu (intengo ephezulu).Inani lempahla yamapayipi likhulu kunalelo lamaphrofayili.Inani eleqile lokugcwalisa lizokwenza ukuthi ukumelana komthelela kwehle futhi ukumelana nokucindezela kwepayipi kwehle.Ngakho-ke, kumapayipi amakhemikhali namapayipi okuhambisa amanzi, inani lokugcwalisa ngamakhophi angaphansi kwe-10.Inani lokugcwalisa epayipini lokudonsa kanye nomkhono wokulutha owakheke ngokubanda lingaba ngaphezulu, futhi inani le-CPE linganyuswa ukuze kuguqulwe ukwehla kokusebenza komthelela.
Kumapayipi anezidingo eziphansi zokusebenza kwamapayipi, namapayipi emvula, inani lokugcwalisa lingaba likhulu, kodwa ukugqokwa kwe-twin-screw extruder kubucayi.
4. Isilungisi
(1) Isilungisi sokucubungula: amapayipi ajwayelekile angasetshenziswa kancane noma cha;amapayipi kathayela namapayipi anezindonga ezincane asetshenziswa kakhulu.
(2) Isilungisi somthelela: umthamo omncane kunamaphrofayili, ngenxa yezizathu ezimbili: 1. Ukusebenza, ukumelana nezinga lokushisa eliphansi, amandla aqinile 2. Izindleko
(3) Ezinye izithasiselo, imibala, njll.: Uma iphrofayili isetshenziswa njenge-ejenti elwa nokuguga, i-titanium dioxide kufanele yengezwe.Ifomula yepayipi ye-PVC eqinile ngokuyinhloko i-pigment, ikakhulukazi i-titanium dioxide noma i-carbon black, engakhethwa ngokuvumelana nezidingo zokubukeka kwepayipi.
5. Ukumatanisa okokugcoba kwangaphandle nesiqinisi
(1) Khetha i-lubricant yangaphandle ehambisanayo ngokusho kwesiqinisi
a.I-Organotin stabilizer.I-organic tin stabilizer inokuhambisana okuhle ne-PVC resin, futhi inomkhuba ojulile wokunamathela odongeni lwensimbi.I-lubricant yangaphandle eshibhe kakhulu efana nayo iyisistimu ye-parafini esekelwe kupharafini-calcium stearate.
b.I-lead salt stabilizer.I-lead stabilizer ayihambisani kahle ne-PVC resin, futhi inamathela kuphela ebusweni bezinhlayiya ze-PVC, ezivimbela ukuhlangana phakathi kwezinhlayiya ze-PVC.Ngokuvamile, i-lead stearate-calcium stearate lubricant yangaphandle isetshenziswa ukuyifanisa.
(2) Inani lokuthambisa langaphandle.Uma ukulungisa inani lokuthambisa kwangaphandle kusengakwazi ukuhlangabezana nezidingo zokucubungula okubalulekile, ungacabanga ukwengeza inani elincane lesigcobo sangaphakathi.Lapho kusetshenziswa isilungisi sokuqinisa umthelela, ngenxa ye-viscosity ephezulu yokuncibilika, amathuba okunamathela endaweni yensimbi aphakeme, futhi inani lokuthambisa kwangaphandle ngokuvamile lidinga ukwanda;Ipayipi elinezindonga eziwugqinsi lidinga okokugcoba kwangaphandle okwengeziwe.Lapho izinga lokushisa lokucubungula liphezulu, ukuthambekela kokuncibilika kokunamathela endaweni yensimbi kuphezulu, futhi kufakwe ama-lubricant amaningi angaphandle.
Enziwa Kanjani Amapayipi e-PVC?
Amapayipi e-PVC akhiqizwa nge-extrusion ye-PVC yempahla eluhlaza, futhi ngokuvamile alandela izinyathelo ezifanayo zemisebenzi evamile yokukhipha amapayipi:
- Ukuphakelwa kwama-pellets/impushana yezinto ezingavuthiwe ku-PVC twin screw extruder
- Ukuncibilika nokushisisa ezindaweni eziningi ze-extruder
- Ukukhipha idayizi ukuze kube ipayipi
- Ukupholisa kwepayipi elimise
- Ukusika amapayipi e-PVC ubude obufunayo
Isikhathi sokuthumela: Jul-04-2022