M'zaka zaposachedwa, pakhala pali chitukuko chofulumira cha fiber-reinforcedThermoplastic kompositi ndi utomoni wa thermoplastic monga matrix, ndipo pali chiwonjezeko cha kafukufuku ndi chitukuko cha zophatikizika zapamwambazi padziko lonse lapansi. Thermoplastic composites ndi composites opangidwa ndi ma polima thermoplastic monga polyethylene (PE), polyamide (PA), polyphenylene sulfide (PPS), polyetherimide (PEI), polyether ketone (PEKK) ndi polyether ether ketone (PEEK) monga masanjidwewo ndi osiyanasiyana mosalekeza/osiya. ulusi (monga ulusi wa kaboni, ulusi wagalasi, ulusi wa aramid, etc.
Mafuta a Thermoplastic-based composites nthawi zambiri amakhala a Long Fiber reinforced Thermoplastics (LFT), MT matepi osakhazikika omwe anali asanalowetsedwepo ndi magalasi olimbitsa Thermoplastics(CMT).
Malinga ndi kugwiritsa ntchito zofunikira zosiyanasiyana, matrix a resin ali ndi PPE.PAPRT, PELPCPES, PEEKPI, PA ndi mapulasitiki ena opangira thermoplastic.
Thermoplastic matrix
Matrix a Thermoplastic ndi mtundu wazinthu zopangira thermoplastic zomwe zimakhala ndi makina abwino komanso kukana kutentha zomwe zingagwiritsidwe ntchito pazinthu zosiyanasiyana zamafakitale. Matrix a Thermoplastic ali ndi mphamvu zambiri, kukana kutentha komanso kukana bwino kwa dzimbiri.
Thermoplastic resins panopa ntchito muzamlengalenga makamaka kutentha kwambiri, mkulu-ntchito utomoni matrices, kuphatikizapo PEEK, PPS ndi PEI, amene amorphous PEI ntchito kwambiri ntchito zazamlengalenga kuposa theka-crystalline PPS ndi PEEK, amene amorphous PEI. ili ndi ntchito zambiri m'mapangidwe a ndege kuposa PPS ya semi-crystalline ndi kutentha kwakukulu kwa PEEK chifukwa cha kutentha kwake kochepa komanso mtengo wokonza.
Utoto wa Thermoplastic uli ndi mawonekedwe abwino amakina ndi kukana kwamankhwala, kutentha kwapamwamba kwautumiki, mphamvu zenizeni zenizeni ndi kuuma, kulimba kwamphamvu kwapang'onopang'ono ndi kulekerera kuwonongeka, kukana kutopa kwambiri, kutha kuumba ma geometries ndi mapangidwe ovuta, kusinthika kwamafuta, kusinthikanso, kukhazikika bwino m'malo ovuta. , repeatable akamaumba, ndi weldability, etc.
Zophatikiza wopangidwa ndi utomoni wa thermoplastic ndi zolimbitsa thupi zili ndi zabwino zambiri monga kulimba, kulimba kwambiri, kukana kwambiri komanso kulekerera kuwonongeka; CHIKWANGWANI prepreg sifunika kusungidwa kutentha otsika kachiwiri, zopanda malire prepreg yosungirako nthawi; yochepa akamaumba mkombero, weldable, mkulu zokolola, zosavuta kukonza; zotsalira zimatha kubwezeredwa ndi kugwiritsidwanso ntchito; ufulu waukulu wamapangidwe azinthu, ukhoza kupangidwa kukhala mawonekedwe ovuta, kusinthasintha kwamitundu yonse, etc.
Kulimbitsa zinthu
Nthawi zambiri, kutalika kwa ulusi waufupi wolimbitsa ulusi ndi 0.2 mpaka 0.6 mm, ndipo popeza ulusi wambiri ndi wosakwana 70 μm m'mimba mwake, kotero ulusi wamfupi umawoneka ngati ufa. Ulusi wachifupi wolimbitsa thermoplastics nthawi zambiri amapangidwa ndi kusakaniza ulusi kukhala thermoplastics wosungunuka. Kutalika ndi kulunjika kwa ulusi mu matrix kumapangitsa kuti zikhale zosavuta kunyowetsa bwino, ndipo zophatikizira zazifupi ndizosavuta kupanga poyerekeza ndi zida zazitali komanso zosalekeza zolimbitsidwa ndi ulusi, koma ndikusintha pang'ono pamakina. Ma composites afupikitsa amatha kupangidwa kukhala magawo omaliza ndi njira zowumba kapena zotulutsa chifukwa ulusi waufupiwo umakhala ndi mphamvu zochepa pakuyenda.
Ma composites okhala ndi fiber yayitali Nthawi zambiri amakhala pafupifupi 20 mm mu utali wa ulusi ndipo nthawi zambiri amakonzedwa pogwiritsa ntchito ulusi wopitilira womwe umalowetsedwa ndi utomoni ndikudula mpaka utali wina. Njira yomwe imagwiritsidwa ntchito kwambiri ndi njira yopangira ma pultrusion, momwe kuyendayenda kosalekeza kwa ulusi wosakanikirana ndi utomoni wa thermoplastic kumapangidwa potambasula ulusiwo kudzera pakufa kwapadera. Pakali pano, PEEK thermoplastic composites yowonjezera fiber imatha kukhala ndi mawonekedwe opitilira 200 MPa kudzera pa FDM yosindikiza ndi modulus yopitilira 20 GPa, ndikuchita bwino kudzera mu jekeseni.
Ulusi womwe umakhala muzowonjezera zowonjezeredwa ndi fiber ndi "zopitilira" ndipo zimakhala zazitali kuchokera pamamita angapo mpaka masauzande angapo. Zophatikizika za ulusi wopitilira apo nthawi zambiri zimapezeka ngati ma laminate, matepi a prepreg, kapena ma braids, opangidwa ndikuyika matrix omwe amafunidwa a thermoplastic ndi ulusi wopitilira.
Kodi zinthu zophatikizika zomwe zimalimbikitsidwa ndi ulusi ndi ziti?
Ma fiber olimbitsa ma composites ndi ma composites opangidwa ndi kupindika, kuumba kapena pultrusion njira zolimbikitsira fiber fiber, monga galasi fiber, carbon fiber, aramid fiber, etc., ndi matrix zinthu. Malinga ndi zida zosiyanasiyana zolimbikitsira, zophatikizira zomwe zimalimbikitsidwa ndi fiber zimagawidwa kukhala magalasi opangidwa ndi magalasi (GFRP), kaboni fiber reinforced composites (CFRP) ndi aramid fiber reinforced composites (AFRP).
Chifukwa cha zotsatirazi za fiber-reinforced composites:
(1) mphamvu zazikulu ndi modulus mkulu;
(2) designability wa katundu katundu;
(3) kukana bwino kwa dzimbiri ndi kulimba;
(4) coefficient of thermal expansion yofanana ndi konkriti.
Makhalidwe awa amapangaZithunzi za FRPItha kukwaniritsa zofunikira zanyumba zamakono mpaka kutalika kwakukulu, zazitali, zolemetsa, zolemetsa zopepuka komanso mphamvu yayikulu, ndikugwira ntchito movutikira, komanso kukwaniritsa zofunikira pakukula kwa zomangamanga zamakono zamafakitale, kotero zimagwiritsidwa ntchito kwambiri. m'nyumba zosiyanasiyana za anthu, milatho, misewu ikuluikulu, zam'madzi, zomangira ma hydraulic ndi nyumba zapansi panthaka.
Dinani apakuti mumve zambiri pazambiri zophatikizika zaGRECHO Fiberglass
Nthawi yotumiza: Mar-31-2023
