2Cov hau kev rov ua dua tshiab

 Nws feem ntau muaj ob txoj kev: Melt agglomeration thiab extrusion pelletizing, feem ntau ntawm cov uas siv cov kev zam kev sib txuas lus pelletizing pelletizing pelletizing. Cov txheej txheem ntawm ob txoj kev yog raws li hauv qab no.

2.1 yaj agglomeration txoj kev

 Cov khoom pov tseg khoom - Xaiv thiab ntxuav - kom qhuav - txiav cov kab txaij - kev kub ceev pelletizing (pub mis - dej txau - pelletizing) kev tshem tawm.

2.2 Kev Tshem Tawm Pelletizing Txoj Kev

 Cov khoom pov tseg - xaiv cov khoom siv - ntxuav - kom kom kom kom kom qhuav - txiav - cua sov extrusion - cua txias thiab txiav - ntim.

 Cov khoom siv siv nyob rau hauv extrusion txoj kev yog tus kheej ua ob-theem extruder, nyob rau hauv kev txiav txim siab roj av, tseem muaj tso tawm extruder. Txhawm rau tshem tawm cov khib nyiab hauv cov khib nyiab, 80-120 mesh cov ntxaij yuav tsum tau siv thaum tso tawm ntawm extruder.

3Kev siv cov khoom siv ua rov ua dua tshiab thiab cuam tshuam rau kev ua yeeb yam ntawm PP hnab vim muaj kev ua kom zoo dua qub, tshwj xeeb tshaj plaws ntawm cov txheej txheem yas, txuas nrog cov kev ua haujlwm ntawm cov khoom siv hluav taws xob, tshwj xeeb yog kev siv hluav taws xob, kev ua haujlwm ntau dua, kev ua tau zoo tau txo qis.

4Kev siv cov khoom siv rov ua dua tshiab ntawm kev hloov kho ntawm cov txheej txheem kos duab vim yog cov khoom siv ua kom sov thiab siv sijhawm ua haujlwm siv hluav taws xob tsawg dua nrog kev nce thiab nce. Yog li ntawd, tom qab ntau npaum li cas ntawm cov khoom siv rov ua tau ntxiv rau cov khoom siv tshiab, thiab kev hloov chaw kom haum rau cov khoom siv tshiab ntawm cov qub thiab cov khoom sib xyaw tshiab.

 Ntawm qhov tod tes, raws li cov khoom siv ua dua tshiab tau ua ntau zaus, qhov hnyav molecular yog txo thiab muaj ntau cov chains luv luv tam sim no, thiab nws tau ncab thiab taw qhia ob peb zaug. Yog li ntawd, nyob rau hauv cov txheej txheem ntau lawm, txoj kev ncab cov txheej txheem yuav tsum tau kho kom zoo dua piv rau tib cov khoom siv tshiab. Feem ntau, ncab cov khoom ncab yog 4 - 5 zaug rau cov khoom tshiab thiab 3 - 4 zaug rau cov khoom siv rov ua dua ntawm 40%. Kuj vim qhov nce hauv melt indexed ntsuas cov khoom siv rov qab, yog li hauv tib cov ntsia hlau ceev thiab kub, lub traction ceev ntawm cov hlau kos duab yuav tsum tau nrawm dua. Hauv kev sib xyaw ntawm cov khoom tshiab thiab qub qub, nws tsim nyog sau cia tias cov sib xyaw yuav tsum yog homogeneous; Nyob rau tib lub sijhawm, cov ntaub ntawv raw nrog zoo li yaj yaj yuav tsum tau xaiv kom deb li deb tau kom phim. Qhov sib txawv hauv melt Performance index yog loj, thiab qhov sib txawv hauv yaj kub yog loj. Nyob rau hauv yas extrusion, ob cov ntaub ntawv raw tsis tuaj yeem muab cov roj hmab tau cuam tshuam rau qhov ceev ntawm extrusion thiab ncab, ua rau cov khoom lag luam siab lossis tseem tsis muaj peev xwm ua tau.