1. txheeb ze humidity nyob rau hauv lub thoob
Nws yuav tsum to taub zoo tias cov av noo cuam tshuam rau qhov ziab ceev ntawm cov thoob yas. Yog li ntawd, qhov txheeb ze av noo ntawm cov thoob yas kuj yog ib qho tseem ceeb cuam tshuam rau cov khoom zoo. Thaum tus txheeb ze av noo nyob rau hauv lub chim yog tsawg, cov dej vapor siab sib txawv ntawm qhov chaw thiab lub tshuab ziab khaub ncaws yog loj, thiab lub ziab ceev yog ceev, thiab vice versa.
2. Melt siab
Lub siab yaj siab txhawb nqa zoo plasticization thiab cov xim sib txawv ntawm cov sib tov. Vim tias nws yog sib tov ntawm siab - qhov ceev polyethylene thiab qis}, thiab huab {{{3} Zoo li cov qauv ntawm cov parison raug txo. Yog li peb yuav ua kom cov ntsia hlau ceev kom nce lub siab yaj.
3. Kub
Rau cov thoob yas, nws yog ib qho tseem ceeb heev kom paub qhov kub thiab txias. Qhov no yog vim qhov kub thiab txias muaj feem cuam tshuam rau kev ua haujlwm ntawm cov yas extrusion thiab parison. Ua kom qhov kub thiab txias ntawm extruder tuaj yeem txo qhov viscosity ntawm cov yaj, txhim kho cov kua dej ntawm cov yaj, txo cov hwj huam siv, thiab ua kom cov ntsia hlau ceev tsis cuam tshuam rau kev ua haujlwm ntawm cov yas. Mixing thiab plasticizing nyhuv. Txhawm rau ua tiav qhov no, koj tuaj yeem siv lub tshuab hluav taws xob kub tswj kom ruaj khov ntawm cov txheej txheem kub thaum txuag hluav taws xob tseem ceeb.
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