Tam sim no, cov khoom siv hauv cov kav dej siv hauv tsheb tuaj yeem muab faib ua peb pawg, uas yog cov kav dej nylon, cov kav dej roj hmab thiab cov kav hlau. Feem ntau siv cov nylon raj feem ntau yog PA6, PA11 thiab PA12, peb cov ntaub ntawv no suav nrog hu ua aliphatic PA, PA6, PA12 rau lub nplhaib qhib polymerization, PA11 rau condensation polymerization. Feem ntau, qhov yooj yim ntawm cov khoom siv molecular ntawm cov kav dej hauv tsheb, qhov yooj yim dua nws yog crystallize.
Cov txheej txheem ntawm nylon raj yog:
▼ Extrusion txheej txheem: Cov khoom siv raw khoom muab cov khoom siv raw rau cov kav xa dej. Tus neeg xa khoom yuav tsum ua ntej ua cov khoom rau hauv cov kav dej, thiab cov khoom siv ntau lawm yog tsim los ntawm ntau ntu.
▼ Cov txheej txheem tsim: Ua cov yeeb nkab extruded ncaj rau hauv cov duab xav tau.
▼ Cov txheej txheem sib dhos: Raws li cov qauv tsim, kev sib koom ua ke txuas nrog cov kav dej. Feem ntau muaj cov kev sib txuas hauv qab no: ① slub type ② clamp type
