M'zaka zaposachedwa, kugwiritsa ntchito mapulasitiki apadera auinjiniya kwafalikira pang'onopang'ono kuchokera kunkhondo zam'mbuyo zam'mlengalenga ndi zamlengalenga kupita kumadera ochulukirapo a anthu wamba, monga magalimoto, kupanga zida, ndi zinthu zogula kwambiri.Pakati pawo, polyphenylene sulfide (PPS) ndi polyetheretherketone (PEEK) ndi mitundu iwiri ya mapulasitiki apadera aumisiri omwe ali ndi chitukuko chofulumira komanso osiyanasiyana.
PEEK ndiyabwino kuposa PPS potengera mphamvu, kulimba, komanso kutentha kwakukulu kogwira ntchito.Pankhani ya kukana kutentha kwambiri, kutentha kwa PEEK kumakhala pafupifupi 50 ° C kuposa kwa PPS.Kumbali inayi, mwayi wodziwikiratu wamtengo wapatali komanso magwiridwe antchito abwino a PPS amapangitsa kuti igwiritsidwe ntchito kwambiri.
PPS ili ndi maubwino otsatirawa:
(1) Cholepheretsa moto wamkati
Different from PC and PA, PPS pure resin and its glass fiber/mineral powder filled composites can easily achieve V-0 @ 0.8mm or even thinner thickness V-0 flame retardant without adding any flame retardant level. Although PC and PA have cheaper prices and better mechanical strength (especially impact strength) than PPS, the cost of PC and PA composites with halogen-free flame retardant formulations (V-0@0.8mm level) is higher than that of PPS. It will rise sharply, and in many cases even higher than PPS materials with the same mechanical strength.
(2) Kuchuluka kwamadzimadzi
M'malo ogwiritsira ntchito chivundikiro cha kope, mwayi uwu ndiwowonekera kwambiri kuposa wa PC.Kuchulukitsa kowonjezera sikungokhudza kwambiri kuchuluka kwa zinthuzo ndikuyambitsa zovuta pakukonza, komanso kumayambitsa mavuto monga ulusi woyandama pamwamba, zida zankhondo zazikulu, komanso kusayenda bwino kwamakina.Kwa semi-crystalline PPS, madzi ake ochulukirapo amalola kuti kudzaza kwagalasi kupitirire 50%.Pa nthawi yomweyo, mu ndondomeko ya kutentha kusungunuka kusakanikirana ndi extrusion, kukhuthala kwapansi kwa PPS poyerekeza ndi PC kungapangitse ulusi wa Galasi kuti ukhale wochepa kwambiri wa shear ndi extrusion, zomwe zimapangitsa kuti nthawi yayitali yosungiramo ikhale yotalikirapo m'nkhani yomaliza yopangidwa ndi jekeseni. kumawonjezera modulus.
(3) Mayamwidwe amadzi otsika kwambiri
Ubwino uwu ndi wa PA.Pankhani ya fluidity, PA ndi PPS zodzazidwa kwambiri ndizofanana;komanso pamakina, ma composites a PA okhala ndi kuchuluka komweko amadzaza kwambiri.Zotsatira zake ndikuti chiwongolero cha zinthu za PPS chifukwa cha mayamwidwe amadzi ndi otsika kwambiri kuposa azinthu za PA pansi pamikhalidwe yomweyi.
(4) Mapangidwe achitsulo apadera komanso kuuma kwapamwamba
Kupyolera mu kuphatikizika kwa nkhungu zapadera ndi kutentha koyenera kwa nkhungu, mbali zopangira jekeseni wa PPS zidzatulutsanso phokoso lofanana ndi kugunda zitsulo pansi pa kukhudza kwa manja a munthu, ndipo pamwamba padzakhala ngati galasi, ndi zitsulo zonyezimira.
PEEK ili ndi zotsatirazi zodziwika bwino:
(1) Kukana kutentha kwambiri.
Itha kugwiritsidwa ntchito kwa nthawi yayitali pa 250 ° C, kutentha kumatha kufika 300 ° C nthawi yomweyo, ndipo sikuwola kwakanthawi kochepa pa 400 ° C.
(2) Makina abwino kwambiri komanso kukhazikika kwazithunzi.
PEEK ikhoza kukhalabe ndi mphamvu zambiri pa kutentha kwakukulu.Mphamvu yopindika pa 200 ° C imatha kufikira 24 MPa, ndipo mphamvu yopindika ndi mphamvu yopondereza pa 250 ° C imatha kufikira 12-13 MPa.Ndizoyenera kwambiri kupanga zinthu zopitirirabe pa kutentha kwakukulu.zigawo zogwirira ntchito.PEEK ili ndi kukhazikika kwakukulu, kukhazikika kwabwino komanso kocheperako kowonjezera kwa mzere, womwe uli pafupi kwambiri ndi aluminiyumu yachitsulo.Kuphatikiza apo, PEEK imakhalanso ndi kukana kwabwino kwa kukwapula, imatha kupirira kupsinjika kwakukulu panthawi yautumiki, ndipo sikungadzetse kukulitsa kwakukulu chifukwa chakuwonjezeka kwa nthawi.
(3) Kukana kwamphamvu kwamankhwala.
PEEK imatsutsa mankhwala ambiri bwino, ngakhale pa kutentha kwakukulu, ndi kukana kwa dzimbiri mofanana ndi chitsulo cha nickel.Nthawi zonse, chinthu chokhacho chomwe chingasungunuke PEEK ndi sulfuric acid.
(4) Good hydrolysis kukana.
Kugonjetsedwa ndi kuwonongeka kwa mankhwala ndi madzi kapena mpweya wothamanga kwambiri wa madzi.Pansi pa kutentha kwambiri komanso kuthamanga kwambiri, zigawo za PEEK zimatha kugwira ntchito mosalekeza m'malo amadzi ndikusungabe makina abwino.Monga kumizidwa mosalekeza m'madzi pa 100 ° C kwa masiku 200, mphamvuyo imakhalabe yosasinthika.
(5) Kuchita bwino koletsa moto.
Ikhoza kufika pa mlingo wa UL 94 V-0, imadzizimitsa yokha, ndipo imatulutsa utsi wochepa ndi mpweya wapoizoni pansi pamoto.
(6) Kuchita bwino kwamagetsi.
PEEK imasunga mphamvu zamagetsi pamtunda wambiri komanso kutentha.
(7) Kukana kwamphamvu kwa radiation.
PEEK ili ndi mawonekedwe okhazikika amankhwala, ndipo magawo a PEEK amatha kugwira ntchito bwino pamiyeso yayikulu ya radiation ya ionizing.
(8) Kulimba mtima.
Kukana kutopa kusinthasintha kupsinjika ndikwabwino kwambiri kuposa mapulasitiki onse ndipo kumafanana ndi ma alloys.
(9) Kukangana kwabwino komanso kukana kuvala.
Kukana kuvala kwambiri komanso kugundana kochepa kumasungidwa pa 250 ° C.
(10) Kuchita bwino pokonza.
Easy extrusion ndi jekeseni akamaumba, ndi mkulu akamaumba Mwachangu.
Nthawi yotumiza: 01-09-22