1. Kev cuam tshuam ntawm iav fiber ntau filling specification ntawm PA6 engineering plastics
Peb tuaj yeem nrhiav tau los ntawm daim ntawv thov thiab kev sim uas cov ntsiab lus Performance index feem ntau yog ib qho ntawm cov kev cuam tshuam loj tshaj plaws hauv cov khoom siv fiber ntau.
Nrog rau qhov nce hauv cov ntsiab lus iav fiber ntau, cov iav fiber ntau hauv ib cheeb tsam ntawm cov khoom yuav nce, uas txhais tau hais tias PA6 matrix ntawm cov iav fibers yuav ua thinner. Qhov kev hloov pauv no txiav txim siab qhov cuam tshuam qhov hnyav, lub zog tensile, khoov lub zog, thiab lwm yam khoom siv ntawm iav fiber ntau PA6 composites.
Nyob rau hauv cov nqe lus ntawm kev cuam tshuam kev ua tau zoo, qhov nce ntawm cov iav fiber ntau cov ntsiab lus yuav ua rau kom muaj zog ntawm PA6. Noj ntev iav fiber ntau (LGF) sau PA6 ua piv txwv, thaum lub ntim ntim nce mus rau 35 feem pua, qhov kev cuam tshuam lub zog yuav nce los ntawm qhov qub 24.8J / m rau 128.5J / m.
Tab sis cov ntsiab lus ntawm cov iav fiber ntau tsis yog qhov zoo dua, luv iav fiber ntau (SGF) ntim ntim tau txog 42 feem pua, thiab qhov cuam tshuam lub zog ntawm cov khoom mus txog qhov siab tshaj 17.4kJ / ㎡, tab sis txuas ntxiv ntxiv yuav cia qhov sib txawv ntawm qhov cuam tshuam lub zog qhia tau hais tias. nqes nqes.
Nyob rau hauv cov nqe lus ntawm dabtsi yog khoov lub zog, qhov nce ntawm cov iav fiber ntau yuav ua rau cov bending kev nyuaj siab yuav kis tau ntawm cov iav fiber los ntawm cov resin txheej; Nyob rau tib lub sijhawm, thaum lub iav fiber ntau rub tawm ntawm cov resin los yog tawg, nws yuav nqus tau ntau lub zog, yog li txhim kho qhov khoov lub zog ntawm cov khoom.
Cov kev xav saum toj no raug txheeb xyuas los ntawm kev sim. Cov ntaub ntawv qhia tau hais tias thaum LGF (ntev iav fiber ntau) yog siv los sau txog 35 feem pua, qhov khoov elastic modulus nce mus rau 4.99GPa. Thaum cov ntsiab lus ntawm SGF (luv iav fiber ntau) yog 42 feem pua, qhov khoov elastic modulus ncav cuag 10410MPa, uas yog li 5 npaug ntawm cov ntshiab PA6.
2. Kev cuam tshuam ntawm iav fiber ntau tuav ntev ntawm PA6 composites
Qhov ntev ntawm cov iav fiber ntau kuj muaj qhov pom tseeb ntawm cov khoom siv ntawm cov khoom siv. Thaum qhov ntev ntawm cov iav fiber ntau tsawg dua qhov ntev ntawm qhov tseem ceeb (qhov ntev ntawm cov fiber ntau uas tuaj yeem ua rau cov khoom muaj lub zog tensile ntawm raw fiber), qhov sib cuam tshuam ntawm cov iav fiber ntau thiab cov resin nce nrog qhov nce ntawm cov iav fiber ntau. qhov ntev ntawm cov iav fiber ntau. Thaum cov khoom sib xyaw puas lawm, qhov kev tiv thaiv ntawm cov iav fiber ntau rub tawm ntawm cov resin kuj yog ntau dua, txhawm rau txhim kho lub peev xwm los tuav lub tensile load.
Thaum lub sij hawm ntev ntawm cov iav fiber ntau tshaj qhov tseem ceeb, lub iav fiber ntau tuaj yeem nqus tau ntau lub zog nyob rau hauv qhov cuam tshuam. Tsis tas li ntawd, qhov kawg ntawm cov iav fiber ntau yog qhov pib taw tes ntawm kev loj hlob tawg, thiab tus naj npawb ntawm qhov kawg ntawm cov iav fiber ntau nrog qhov ntev ntev yog qhov tsawg dua, thiab qhov cuam tshuam lub zog tuaj yeem txhim kho tau zoo.
Cov txiaj ntsig kev sim qhia tau hais tias lub zog tensile ntawm cov khoom nce ntawm 154.8MPa mus rau 164.4MPa thaum cov iav fiber ntau khaws cia ntawm 40 feem pua thiab qhov ntev ntawm cov iav fiber ntau nce los ntawm 4mm mus rau 13mm. Lub zog dabtsi yog khoov thiab qhov cuam tshuam lub zog tau txhim kho los ntawm 24 feem pua thiab 28 feem pua.
Ntxiv mus, kev tshawb fawb qhia tau hais tias thaum thawj qhov ntev ntawm cov iav fiber ntau tsawg dua 7 hli, cov khoom ua tau zoo nce ntxiv. Piv nrog luv iav fiber ntau, iav ntev fiber ntau siv PA cov khoom muaj kev sib tw zoo dua, thiab tuaj yeem tswj xyuas cov khoom siv zoo dua nyob rau hauv qhov kub thiab txias.
3. Kev cuam tshuam ntawm iav fiber ntau hom ntawm PA6 composites
Hom thiab lub zog ntawm iav fiber ntau yuav muaj qhov sib txawv ntawm lub zog tag nrho ntawm cov khoom. Tam sim no, lub ntsiab hom iav fiber ntau tsis muaj alkali iav fiber ntau, siab zog iav fiber ntau alkali resistant iav fiber ntau, thiab lwm yam.
Ntawm lawv, cov iav fiber ntau nrog lub zog monofilament muaj zog muaj peev xwm ua tau zoo dua, thiab cov txiaj ntsig kev sim qhia tau tias cov iav fiber ntau zog PA6 muaj cov khoom siv zoo dua qub uas tsis yog-alkali fiber-reinforced PA6.
Nws tuaj yeem pom tau tias kev xaiv cov iav fiber ntau nrog lub zog siab, ntev ntev, thiab qhov tsim nyog ntim tuaj yeem pab cov khoom siv txhim kho toughness, cuam tshuam tsis kam, thiab lwm yam khoom siv kho tshuab.
4. Kev cuam tshuam ntawm cov iav fiber ntxiv txheej txheem ntawm PA6 composites
Nyob rau hauv tus txheej txheem ntawm ntxaib-ntsia hlau hloov granulation, lub cawv ntawm txoj hauj lwm pub rau cov khoom siv nyob rau hauv kev sib xyaw ntawm iav fiber ntau thiab cob tau kawm. Nws tau pom tias yog tias cov iav fiber ntau tau ntxiv ua ntej, cov fiber ntau yuav raug rhuav tshem yooj yim thiab qhov ntev ntawm cov iav fiber ntau yuav me dua. Thaum ntxiv lig, cov iav fiber ntau yog qhov nyuaj rau kev sib xyaw nrog cov resin uniformly, thiab kev sib xyaw ua ke tsis muaj zog. Ob qho tib si ntawm cov xwm txheej no yuav ua rau kev ua haujlwm tag nrho ntawm cov khoom siv tsawg dua cov txiaj ntsig zoo.
Siv sab pub rau ntxiv iav fiber ntau yooj yim los tswj cov ntsiab lus ntawm iav fiber ntau, thiab tuaj yeem txo cov fiber ntau tawg. Nyob rau tib lub sijhawm, nyob rau hauv cov txheej txheem ntawm extrusion granulation, nce qhov kub ntawm extrusion thiab txo qhov extrusion siab tuaj yeem txhim kho qhov ntev ntawm GF mus rau ib qho twg.
5. Kev cuam tshuam ntawm cov txheej txheem extrusion ntawm hloov granulation ntawm iav fiber reinforced PA khoom
Cov txiaj ntsig kev sim qhia tau hais tias qhov ntsuas kub qis extrusion tsis zoo rau cov txheej txheej infiltration ntawm iav fiber ntau, thiab qhov kub siab yuav txo qhov kev ua haujlwm ntawm cov khoom nws tus kheej. Yog li ntawd, thaum cov iav fiber ntau ntau dua, nws yog qhov zoo dua los ua kom qhov kub ntawm extrusion kom ua tiav cov txiaj ntsig zoo dua.
Thaum lub ntxaib-ntsia hlau extrusion mechanism yog siv los npaj cov iav fiber reinforced hais, lub tensile modulus, tensile zog, dabtsi yog khoov zog, dabtsi yog khoov modulus thiab lwm yam kev taw qhia ntawm cov khoom yog maj mam nce nrog nce tus tswv ceev ntawm 70r / min mus rau 300r. / min. Thaum tus tswv tsev ceev tau nce mus rau 450r / min, cov khoom ntawm cov khoom muaj kev hloov pauv me ntsis lossis qis me ntsis.
Tsis tas li ntawd, kev pub mis ceev yuav cuam tshuam rau lub sijhawm nyob ntawm cov khoom siv hauv cov ntsia hlau. Lub tensile modulus, tensile lub zog, flexural modulus, flexural zog thiab txawm lub zog ntawm cov composites maj mam txo nrog cov pub ceev nce los ntawm 8r / min mus rau 26r / min ntawm tib ceev ntawm lub ntsiab cav.
Yog li ntawd, nyob rau hauv cov txheej txheem kev npaj tiag tiag, nws yog ib qho tsim nyog yuav tsum xaiv qhov tsim nyog ntawm cov khoom siv thiab cov txiaj ntsig, kom tau txais cov khoom lag luam nrog cov txiaj ntsig loj thiab kev ua haujlwm zoo.
6. Cov nyhuv ntawm cov txheej txheem txhaj tshuaj molding ntawm cov khoom ntawm iav fiber reinforced PA cov ntaub ntawv
Nyob rau hauv cov txheej txheem ntawm kev txhaj tshuaj molding, xws li lub tog raj kheej pwm kub, ntsia hlau ceev, txhaj tshuaj siab, tuav siab, rov qab siab, txhaj tshuaj ceev thiab lwm yam yuav cuam tshuam rau kev ua haujlwm ntawm cov khoom molding.
Nws pom tias lub zog tensile ntawm iav fiber reinforced PA6 cov khoom yog ncaj qha proportional rau qhov kub ntawm qhov chaw nres nkoj pub, thiab inversely proportional rau txhaj ceev thiab ntsia hlau ceev. Qhov tawg ntawm cov iav fiber ntau yuav ua rau hnyav dua nrog kev nce ntawm kev txhaj tshuaj nrawm. Tab sis feem ntau hais lus, kev hloov ntawm cov txheej txheem txhaj tshuaj tsis muaj kev cuam tshuam zoo rau cov khoom siv ntawm iav fiber reinforced PA6 qhov chaw txhaj tshuaj.
