Ko te Acrylonitrile-butadiene-styrene copolymer (ABS) he tino pai nga ahuatanga hiko, te aukati makariri, te aukati hinu, te pumau matū, me nga ahuatanga paanga, ka whakamahia nuitia i roto i nga mara o te hikohiko, nga taputapu kaainga me te kawe.Heoi, ko te taupū hāora o ABS he 18% anake, ka taea tonu te tahu i muri i te ahi, e whakawhāiti ana i ana hua ki te maha o nga waahi tono.Hei whakatutuki i te whakatauranga mura ahi o ABS ki te UL94 V-0, he nui te nui o te taapiri mura.Ko nga ahuatanga miihini o te rauemi ka whakahekehia, ka nui ake te utu.
Ko te Acrylonitrile-butadiene-styrene copolymer (ABS) he tino pai nga ahuatanga hiko, te aukati makariri, te aukati hinu, te pumau matū, me nga ahuatanga paanga, ka whakamahia nuitia i roto i nga mara o te hikohiko, nga taputapu kaainga me te kawe.Heoi, ko te taupū hāora o ABS he 18% anake, ka taea tonu te tahu i muri i te ahi, e whakawhāiti ana i ana hua ki te maha o nga waahi tono.Hei whakatutuki i te whakatauranga mura ahi o ABS ki te UL94 V-0, he nui te nui o te taapiri mura.Ko nga ahuatanga miihini o te rauemi ka whakahekehia, ka nui ake te utu.
Ko te Polytetrafluoroethylene (PTFE) he pai te aukati i te whakaheke, a kua whakamahia nuitia i roto i te mura ahi PC / ABS me etahi atu rauemi, engari he iti noa nga korero rangahau mo te PTFE i roto i te ABS mura.Ko te nuinga o te ABS mura ahi i roto i te ahumahi, i te whakauru i te PTFE, i korero mo te painga o te PTFE mo te mahi o te ABS mura.
1. Wāhanga whakamātautau
1.1.Nga rauemi mata matua
ABS, triazine brominated, antimony trioxide, PTFE, antioxidants, lubricants, etc.
1.2.Nga taputapu matua
Kaihuri-a-rua: momo SHJ-35;miihini werohia te miihini: momo T80;te miihini rorohiko-a-rorohiko whakamatautau mo te ao: momo CM6104;taputapu ine pāmahana deformation waiariki: 303;thermogravimetric (TG) tātari: momo 209C.He kaiwhakamatau paanga o te pendulum: Tauira ZBC-25B;Te rewa rere (MFR) taputapu: MPXRZ-40A;Kaitirotiro whakarara me te poutū: Tauira HVR-2.
1.3.Te whakarite tauira
Ko te ABS maroke i te 80 ℃ mo te 3 ki te 5 haora, ka uru ki te ABS, te triazine brominated, te antimony trioxide, te PTFE, me etahi atu taapiri kia rite, ka rewa me te whakakotahi i roto i te extruder twin-screw mo te tangohanga me te granulation.Ko 215-225 ℃ te pāmahana o te tangohanga, ko te tere o te wiri ko te 360 r / min;katahi ka pupuhihia, ka whakamarokehia i te 80 ℃ mo te 2 haora, ka werohia ki te tauira paerewa, ko te pāmahana werohanga 200～210℃.
1.4.Te whakamatautau mahi
Te mahi mura: i whakamatauria kia rite ki te UL94;mahi tensile: whakamatauria kia rite ki GB / T 1040-1992;te kaha piko: i whakamatauria kia rite ki te GB / T 9341-2000;te kaha o te paanga o te kakari cantilever: i whakamatauria kia rite ki te GB/T 1843-1996;MFR: kia rite ki te GB / T 3682-==2000 whakamātautau, pāmahana 220 ℃, kawenga 220kg;te wera o te wera: whakamatautau kia rite ki te GB / T 16341-2004;TG tātaritanga: tere whakawera 10. C / min,.Ko te awhe pāmahana he 30 ~ 700 ℃, i raro i te hau hauota.
2. Nga hua me te matapaki
2.1.Ko te tauira karekau he mura ahi ka wera rawa i muri i te mura tuatahi, a he kino te huanga mura.I te wa e taapirihia ana etahi waahanga o te triazine brominated me te antimony trioxide te aukati mura o te ahi, ka tino pai ake te paanga o te mura o te mura, ka eke te taumata o te mura ki te taumata UL94V-2, engari he roa ake te wa mura, kare tonu te paanga o te mura. pai.Ko te taapiri o te PTFE ka tino whakapoto i te wa wera o te rauemi.Ina taapirihia te 0.2% PTFE, ka piki te taumata mura o te rauemi mai i te V-2 ki te V-0.Ko te mea tenei na te mea he teitei te whakarewanga o te PTFE (323 ° C), a kaore e rewa i te pāmahana tukatuka rauemi, engari he ngawari ki te fibrillate ki te hanga i te whatunga muka i raro i te kaha kutikuti whakakotahi, e whakaiti ana i te horahanga o te mura.
2.2.Whai muri i te taapiri i te mura o te mura, ka tino heke te kaha o te paahitanga o nga rawa, engari he iti noa te whakarereketanga o etahi atu taonga miihini.Engari, ka taapirihia nga mura ahi me te PTFE i te wa ano, ka pai ake te uaua o nga rauemi ki te whakamahi i nga mura ahi anake, a ka piki ake te nui o te PTFE, ka piki ake te kaha o te paanga o te rauemi. e pea Ko te hanganga whatunga muka i hanga e te PTFE i roto i te rauemi whai wāhi whakaū ki tetahi whānuitanga.
2.3.Ka piki ake te nui o te PTFE, ka heke haere te MFR o te rauemi.A, no te te nui o te PTFE tāpiri he 0.3%, te MFR o te ABS retardant mura heke i 23.1g / 10min ki 14.5g / 10min, tohu te pānga o te PTFE i runga i nga āhuatanga rere o te rauemi.Ko te mea nui ko te nuinga na te noho o te PTFE muka-hanga rauemi, e aukati ana i te rere o nga ngota ngota ABS.Na te hanganga motuhake i hangaia e te PTFE i te wa e tukatuka ana, ka ahua pupuhi nga takai rauemi i te putanga o te riu rauemi, ka hua ake nga takai papanga me te puhoi ake te pelletizing.Ko te tangohanga o nga rauemi kaore he PTFE he mea noa ake.
2.4.Te tātari TG me te DTG o nga rawa
He kotahi anake te tihi o te mate waiariki i roto i te tukanga o te mate taimaha waiariki o ABS parakore, a e rua nga tihi o te mate taimaha waiariki ka puta i roto i te tukanga o te mate taimaha wera o te ABS retardant mura.Ko te tihi tuatahi na te pirau o te mura ahi, ko te tihi tuarua na te pirau o te ABS.Na te taapiri o te PTFE, ko te teitei o te wera o te wera o te taumaha (427°C) o ABS he 1.8°C teitei ake i tera o te ABS parakore (428.8°C), engari ko te teitei o te rereketanga o te wera o te taumaha o te taumaha (te tere mate wera papatipu) ( 11.7%/min) he anake Ko te peak differential thermal weight loss rate of pure ABS (18.8%/min) he 62.2%, he 7.9% te iti iho i te peak differential thermal weight loss rate (12.7%/min) o te tauira 28 kore PTFE taapiri.Ko te taapiri o te PTFE ka taea te whakapai ake i te mahi mura o te rauemi.
Ko te Bromotriazine me te antimony trioxide he momo aukati mura halogen-antimony, ehara i te mea ka huri noa i te tauhohenga hau mura engari ka huri ano hoki i te tauhohenga whakahekenga waiariki o te wahanga topu.Ko te toenga waro o te ABS parakore i te 700 ℃ he 1.2%, ka taapirihia te ABS mura ahi me te triazine brominated me te antimony trioxide.Ko te toenga waro i te 700 ℃ he 3.5%.Ko te hanganga o te papanga waro ka awhina ano ki te whakanui ake i te aukati o te rauemi.Te mura.I te wa ano, ko te toenga waro i te 700°C me te PTFE i tapirihia he 3.6%, e tohu ana i rahua te PTFE ki te whakatairanga i te hanga waro.Ko te taapiri o te PTFE ka whakatairanga i te hanganga paparanga waro me te pai ake o te whakamaarama me nga arai hāora, na reira ka whakamahia me te hau-antimony mura ahi, he pai ake te painga o te mura.
3. Whakamutunga
3.1.Ko te taapiri o te PTFE ka taea te whakaheke ake i te teitei o te mate wera wera o te ABS mura ahi, ka tino whakaiti i te wa wera o nga rawa, me te whakapai ake i te karaehe mura o te rauemi.
3.2.Ko te taapiri o te PTFE he iti te paanga ki nga ahuatanga miihini o te ABS mura ahi, a ki tetahi waahanga ka pai ake te uaua o te rauemi.
3.3.He nui te paanga o te PTFE ki nga mahi tukatuka o nga rauemi ABS mura, a me whakatika te inenga kia rite ki nga hiahia i te wa e whakamahia ana.
Wā tuku: Hune-11-2020