1. Cov khoom tseem ceeb ntawm cov khoom siv raw
Kev ua tau zoo ntawm PPR-Specific Compounds: Raw khoom tsim lub hauv paus. High- zoo PPR- cov ntsiab lus tshwj xeeb (random copolymer ntawm propylene thiab ethylene) nthuav tawm cov qauv ntawm cov saw hlau molecular ruaj khov dua thiab ua haujlwm zoo dua. Kev tshawb fawb qhia tau hais tias ethylene monomer cov ntsiab lus thiab kev faib tawm cuam tshuam rau kev coj tus cwj pwm crystallization, yog li txiav txim siab cov khoom siv ntev -lub sij hawm nkag siab ntawm qhov kub siab.
Additive System: Txhawm rau tiv thaiv thermal -oxidative aging ntawm qhov kub siab, stabilizers thiab antioxidants yuav tsum tau muab tso rau hauv cov khoom siv raw. Cov hom thiab qhov ntau ntawm cov tshuaj ntxiv no ncaj qha cuam tshuam rau lub neej kev pabcuam thiab kev ua haujlwm ntawm cov kav dej thaum lub sijhawm ua haujlwm siab - kub.
2. Cov txheej txheem ntau lawm thiab kev tswj qhov kub thiab txias
Extrusion Temperature Settings: Precise temperature control hla txhua ntu ntawm extruder mus rau lub taub hau tuag yog qhov tseem ceeb ntawm cov kab ntau lawm.
Tsis tshua muaj kub: Cov khoom siv tsis txaus plasticization tshwm sim, nrog tsis txaus fusion ntawm cov saw hlau molecular. Qhov no ua rau cov yeeb nkab tsis zoo thiab txo qhov kub tsis kam.
Kub kub heev: Tej zaum yuav ua rau cov khoom decomposition (ua char hais thiab dub streaks). Qhov no tsis yog tsuas yog ua rau cov khoom siv puas tsuaj xwb tab sis kuj ua rau kev laus, ua rau cov khoom kub dua -rhiab heev thaum siv tom ntej.
Screw Speed thiab Shear: Screw ceev txiav txim siab lub zog shear siv rau cov khoom thiab nws lub sijhawm nyob hauv lub thoob. Ib qho kev ceev tsim nyog ua kom zoo zoo plasticization; Kev nrawm nrawm tuaj yeem ua rau muaj kev sib txhuam ntau dhau, ua rau cov khoom kub dhau thiab degradation, uas zoo sib xws rau cov yeeb nkab ntev - lub sij hawm kub tsis kam.
3. Tuag thiab txias tshuab
Tuag Tsim: Cov qauv tuag (xws li kauv lossis pob tawb tuag) yuav tsum xyuas kom meej qhov sib txawv ntawm qhov sib txawv kom txo qis cov kab sib txuas. Weld kab sawv cev rau cov ntsiab lus tsis muaj zog hauv cov kav dej, ua rau tsis ua haujlwm nyob rau hauv qhov kub thiab txias.
Txias thiab teeb tsa: Kev tswj cov cua txias thiab cov dej txias txias ncaj qha cuam tshuam rau PPR crystallinity.
Kev ua kom txias (feem ntau tswj cov dej kub ntawm 15-25 degree) txhawb kev tsim cov qauv zoo, zoo crystalline, uas txhim kho qhov kub thiab txias.
Kev ua kom txias tsis txaus lossis tsis tsim nyog ua rau muaj kev ntxhov siab sab hauv, ua rau deformation los yog tawg thaum lub sij hawm siab - siv kub.
4. Cov Khoom Siv Teeb Meem thiab Cov Txheej Txheem Txheej Txheem
Muaj peev xwm Extruder: Cov ntsia hlau ntev - mus rau - txoj kab uas hla (L/D) thiab seb nws cov qauv tsim puas zoo rau cov khoom siv PPR txiav txim siab plasticization zoo thiab kev ua haujlwm zoo.
Tensioning thiab txiav: Tensioning ceev yuav tsum precisely match extrusion ceev. Cov tensioning ntau dhau ua rau cov yeeb nkab phab ntsa nyias nyias thiab cov kev ntxhov siab sab hauv, cuam tshuam qhov kev ruaj ntseg thiab kev ua haujlwm siab ntawm qhov kub siab.
5. Kev sim thiab cov qauv
Kev Ua Haujlwm Zoo: Qhov ntsuas kub tsis kam ntawm cov khoom siv yeeb nkab kawg yuav tsum raug lees paub los ntawm kev sim ntau, suav nrog Vicat softening kub (VST), hydrostatic zog (tshwj xeeb tshaj yog ntawm 95 degree), thiab thermal oxidation induction lub sij hawm (OIT). Cov txiaj ntsig kev xeem no ua pov thawj ncaj qha tshaj plaws rau kev ntsuam xyuas seb cov txheej txheem cov txheej txheem ua tau raws li cov qauv thiab seb cov khoom siv raw puas tsim nyog.
Txhawm rau tsim cov kav dej PPR nrog qhov ntsuas kub zoo heev, nws yuav tsum muaj kev sib koom ua ke ntawm siab -cov ntaub ntawv tshwj xeeb zoo, cov txheej txheem tswj qhov kub thiab txias, pom cov ntsia hlau thiab pwm tsim, thiab kev ua kom txias thiab ruaj khov.