Muaj ob hom resins siv los tsim cov composites: thermoset thiab thermoplastic. Thermoset resins yog cov resins feem ntau, tab sis thermoplastic resins tau txais kev txaus siab dua vim muaj kev siv cov composites ntau zuj zus.
Cov thermoset resins tawv vim yog cov txheej txheem kho, uas siv cua sov los tsim cov polymers sib txuas ua ke uas muaj cov khoom sib txuas uas tsis yaj lossis tsis yaj uas tsis yaj thaum cua sov. Cov thermoplastic resins, ntawm qhov tod tes, yog cov ceg lossis cov saw ntawm monomers uas mos thaum cua sov thiab khov thaum txias, ib qho txheej txheem rov qab tau uas tsis xav tau kev sib txuas tshuaj lom neeg. Hauv ntej, koj tuaj yeem yaj dua thiab kho dua tshiab cov thermoplastic resins, tab sis tsis yog thermoset resins.
Kev txaus siab rau cov thermoplastic composites tab tom loj hlob, tshwj xeeb tshaj yog nyob rau hauv kev lag luam automotive.
Cov txiaj ntsig ntawm Thermosetting Resins
Cov thermoset resins xws li epoxy lossis polyester yog cov nyiam siv hauv kev tsim khoom sib xyaw vim lawv cov viscosity qis thiab nkag mus rau hauv lub network fiber zoo heev. Yog li nws muaj peev xwm siv ntau cov fibers thiab ua kom lub zog ntawm cov khoom sib xyaw tiav lawm.
Cov dav hlau tiam tshiab feem ntau muaj ntau dua 50 feem pua ntawm cov khoom sib xyaw.
Thaum lub sijhawm pultrusion, cov fibers raug muab tso rau hauv cov thermoset resin thiab muab tso rau hauv cov pwm kub. Qhov kev ua haujlwm no ua rau muaj kev kho kom zoo uas hloov cov resin qis-molecular-weight mus rau hauv cov qauv peb-seem uas cov fibers raug kaw rau hauv lub network tshiab no. Vim tias feem ntau cov kev kho kom zoo yog exothermic, cov kev kho no txuas ntxiv mus ua cov saw hlau, ua rau muaj kev tsim khoom loj. Thaum cov resin teeb tsa, cov qauv peb-seem xauv cov fibers rau hauv qhov chaw thiab muab lub zog thiab kev tawv rau cov khoom sib xyaw.
Lub sijhawm tshaj tawm: Lub Kaum Hli-19-2022
