Sanadihii la soo dhaafay, codsiga balaastigga injineernimada gaarka ah ayaa si tartiib tartiib ah uga soo kordhay dhulkii hore ee militariga iyo hawada hawada ilaa goobo badan oo rayid ah, sida baabuurta, soo saarista qalabka, iyo alaabada macaamiisha ee ugu sareysa. Waxaa ka mid ah, polyphenylene sulfide (PPS) iyo polyethertherketone (PEEK) waa laba nooc oo ah balaastikada injineernimada ee gaarka ah oo leh horumar aad u dhakhso badan iyo kala duwanaansho ballaadhan.
PEEK ayaa ka sarreeya PPS xagga xoogga, adkaanta, iyo heerkulka ugu sarreeya ee shaqada. Marka la eego iska caabbinta heerkulka sare, iska caabbinta heerkulka PEEK ayaa qiyaastii 50°C ka sarreeya kan PPS. Dhanka kale, faa'iidada qiimaha cad ee muuqata iyo waxqabadka habaynta wanaagsan ee PPS ayaa ka dhigaya mid si ballaaran loo isticmaalo.
PPS waxay leedahay faa'iidooyinka waxqabadka ee soo socda:
(1) Dib u celi ololka gudaha
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) Dheecaan aad u sarreeya
Goobta codsiga ee daboolka buug-yaraha, faa'iidadani way ka caddahay tan PC. Qadarka dheeriga ah ee dheeraadka ah kaliya si dhab ah uma saameyn doono dareeraha walxaha waxayna sababi doontaa dhibaatooyinka habaynta, laakiin sidoo kale waxay sababi doontaa dhibaatooyin sida fiilooyinka sabbaynaya dusha sare, dagaal halis ah, iyo qalab farsamo oo liita. Semi-crystalline PPS, dareereheeda aadka u sarreeya ayaa u oggolaanaya buuxinta fiber-ka galaaska inay si fudud uga badan tahay 50%. Isla mar ahaantaana, habka isku-dhafka heerkulka sare ee isku-dhafka iyo extrusion, viscosity hoose ee PPS marka la barbar dhigo kombuyuutarku wuxuu ka dhigi karaa fiilooyinka Glass inay maraan heerar hoose oo xiirid iyo extrusion, taasoo keentay in dhererka sii-haynta dheer ee durida ugu dambeysa ee maqaalka, kaas oo waxay sii kordhisaa modules-ka.
(3) Nuugista biyaha aadka u hooseeya
Faa'iidadani waxay inta badan u tahay PA. Marka la eego dareeraha, PA iyo PPS aadka loo buuxiyey waa is barbar dhig; iyo guryaha makaanikada, PA composites oo leh qadar buuxbuuxinta oo isku mid ah ayaa xitaa aad u badan. Natiijadu waxay tahay in heerka cilladda alaabada PPS ee ay ugu wacan tahay qallooca nuugista biyaha uu aad uga hooseeyo kan badeecadaha PA ee ku jira xaalado isku mid ah.
(4) Qalab bir ah oo gaar ah iyo adkaanta dusha sare
Isku darka caaryada khaaska ah iyo heerkulka caaryada macquulka ah, qaybaha wax-qaabaynta ee PPS waxay sidoo kale soo saari doonaan dhawaaq la mid ah garaacista birta marka la taabto gacmaha bini'aadamka, oogada waxay noqon doontaa mid siman sida muraayadda, oo leh dhalaal macdan ah.
PEEK waxay leedahay sifooyinka soo socda ee muuqda:
(1) Iska caabbinta kulaylka aadka u sarreeya.
Waxa la isticmaali karaa wakhti dheer 250°C, heerkulku waxa uu gaadhi karaa 300°C isla markiiba, si dhib yarna waxa uu u qudhmi karaa wakhti yar 400°C.
(2) Sifooyin farsamo oo heersare ah iyo xasilloonida cabbirka.
PEEK waxay ku ilaalin kartaa xoog sare heerkulka sare. Awoodda foorarsiga ee 200°C waxay weli gaadhi kartaa 24 MPa, xoog laabashada iyo xoogga cufan ee 250°C waxay gaadhi kartaa 12-13 MPa. Waxay si gaar ah ugu habboon tahay soo saarista alaabada joogtada ah ee heerkulka sare. qaybaha shaqada. PEEK waxay leedahay qallafsanaan sare, degenaansho cabbir wanaagsan iyo isugeyn hoose oo fidinta toosan, kaas oo aad ugu dhow aluminium bir ah. Intaa waxaa dheer, PEEK waxay sidoo kale leedahay iska caabin gurguurta oo wanaagsan, waxay u adkeysan kartaa walbahaarka weyn inta lagu jiro xilliga adeegga, mana keeni doonto kordhin weyn sababtoo ah kordhinta waqtiga.
(3) Iska caabin kiimiko oo heersare ah.
PEEK waxay si fiican ugu adkaysataa inta badan kiimikooyinka, xitaa heerkulka sare, oo leh iska caabbinta daxalka oo la mid ah birta nikkel. Xaaladaha caadiga ah, waxa kaliya ee milmi kara PEEK waa sulfuric acid.
(4) Iska caabin biyo-celin wanaagsan.
U adkaysta waxyeelada kiimikaad ee biyaha ama uumiga biyaha-cadaadiska badan. Marka la eego xaalada heerkulka sare iyo cadaadiska sare, qaybaha PEEK waxay si joogto ah uga shaqeyn karaan deegaanka biyaha waxayna wali sii wadaan sifooyin farsamo oo wanaagsan. Sida dhexgalka joogtada ah ee biyaha 100 ° C ilaa 200 maalmood, xooggu wuxuu ahaanayaa mid aan isbeddelin.
(5) Waxqabadka wanaagsan ee ololka.
Waxay gaari kartaa qiimeynta UL 94 V-0, waa is-dejinaysaa, waxayna sii deysaa qiiq yar iyo sunta sunta ah ee xaaladaha ololka.
(6) Waxqabad koronto oo wanaagsan.
PEEK waxay ku haysaa guryaha korantada inta jeer ee balaadhan iyo kala duwanaanta heerkulka.
(7) Iska caabbinta shucaaca xooggan.
PEEK waxay leedahay qaab dhismeed kiimiko ah oo aad u deggan, qaybaha PEEK-na waxay si fiican ugu shaqayn karaan qiyaas sare oo shucaac ah.
(8) Adag wanaagsan.
Caabbinta daalka ee diiqada beddelka ah ayaa ah tan ugu fiican dhammaan balaastigga waxayna la barbar dhigi kartaa alloysyada.
(9) Khilaaf aad u wanaagsan iyo xirashada iska caabin.
Iska caabbinta xirashada sare iyo isku-dhafka hoose ee is-jiidhka ayaa lagu ilaaliyaa 250 ° C.
(10) Waxqabadka habaynta wanaagsan.
Fududeynta fudfudud iyo qaabaynta duritaanka, iyo hufnaanta qaabeynta sare.
Waqtiga boostada: 01-09-22