Plastics ntawm cov khoom sib txawv muaj cov ntsiab lus sib txawv:
Polypropylene: Lub melting point kub yog 165 ° C - 170 ° C, thermal stability yog zoo, lub decomposition kub tuaj yeem ncav cuag 300 ° C, thiab nws pib tig daj thiab deteriorate ntawm 260 ° C nyob rau hauv cov ntaub ntawv ntawm kev sib cuag nrog oxygen. , thiab muaj anisotropy thaum kub molding.Nws yog ib qho yooj yim rau warped los yog twisted vim molecular orientation, thiab muaj zoo folding kev kawm.Cov resin particles muaj ib qho kev ntxhib los mos.Qhov nruab nrab nqus dej yog tsawg dua 0.02%.Qhov tso cai noo noo ntawm molding yog 0.05%.Yog li ntawd, ziab feem ntau tsis ua thaum molding.Nws tuaj yeem qhuav ntawm li 80 ° C rau 1-2 teev, thiab nws cov khoom ntws tau nkag siab rau qhov kub thiab txias thaum lub sij hawm molding.
Polyoxymethylene: Nws yog cov yas kub-rhiab heev nrog lub melting point ntawm 165 ° C, uas yuav decompose heev thiab tig daj ntawm qhov kub ntawm 240 ° C.Lub sijhawm nyob ntawm qhov kub ntawm 210 ° C yuav tsum tsis pub tshaj 20 feeb.Nyob rau hauv cov cua kub ib txwm, nws yuav decompose yog hais tias nws yog rhuab rau lub sij hawm ntev., Tom qab decomposition, yuav muaj ib tug pungent tsw thiab tearing.Cov khoom yog nrog los ntawm daj-xim av kab txaij.Qhov ceev ntawm POM yog 1.41-1.425.-5 teev.
Polycarbonate: pib mos ntawm 215 ° C, pib ntws saum 225 ° C, yaj viscosity hauv qab 260 ° C siab dhau, thiab cov khoom lag luam muaj qhov tsis txaus.Lub molding kub yog feem ntau ntawm 270 ° C thiab 320 ° C.Yog tias qhov kub siab tshaj 340 ° C, qhov decomposition yuav tshwm sim, thiab qhov ziab kom qhuav Qhov kub ntawm 120 ° ~ 130 ° C, thiab lub sij hawm ziab yog ntau tshaj 4 teev.Polycarbonate resin feem ntau tsis muaj xim thiab pob tshab.
Post lub sij hawm: Oct-22-2022