Acrylonitrile-butadiene-styrene copolymer (ABS) ili ndi mphamvu zabwino kwambiri zamagetsi, kukana kuzizira, kukana kwamafuta, kukhazikika kwamankhwala, komanso kukhudzidwa, ndipo imagwiritsidwa ntchito kwambiri m'magawo amagetsi, zida zam'nyumba ndi zoyendera.Komabe, index ya okosijeni ya ABS ndi 18% yokha, ndipo imatha kupitiriza kuyaka pambuyo pa moto, zomwe zimalepheretsa zinthu zake m'magawo ambiri ogwiritsira ntchito.Kuti mukwaniritse kuchuluka kwa moto wa ABS mpaka UL94 V-0, kuchuluka kwa zoletsa moto zomwe zimawonjezeredwa nthawi zambiri zimakhala zazikulu.Mawotchi azinthuzo amachepetsedwa, ndipo mtengo wake ndi wapamwamba.
Acrylonitrile-butadiene-styrene copolymer (ABS) ili ndi mphamvu zabwino kwambiri zamagetsi, kukana kuzizira, kukana kwamafuta, kukhazikika kwamankhwala, komanso kukhudzidwa, ndipo imagwiritsidwa ntchito kwambiri m'magawo amagetsi, zida zam'nyumba ndi zoyendera.Komabe, index ya okosijeni ya ABS ndi 18% yokha, ndipo imatha kupitiriza kuyaka pambuyo pa moto, zomwe zimalepheretsa zinthu zake m'magawo ambiri ogwiritsira ntchito.Kuti mukwaniritse kuchuluka kwa moto wa ABS mpaka UL94 V-0, kuchuluka kwa zoletsa moto zomwe zimawonjezeredwa nthawi zambiri zimakhala zazikulu.Mawotchi azinthuzo amachepetsedwa, ndipo mtengo wake ndi wapamwamba.
Polytetrafluoroethylene (PTFE) ili ndi zotsatira zabwino zotsutsana ndi kugwa ndipo yakhala ikugwiritsidwa ntchito kwambiri pa PC/ABS yoletsa moto ndi zipangizo zina, koma pali malipoti ochepa a kafukufuku wa PTFE mu ABS yoletsa moto.The wamba ABS lawi retardant mu makampani, pamene kuyambitsa PTFE, anakambirana za zotsatira za PTFE pa ntchito ya lawi retardant ABS.
1. Gawo loyesera
1.1.Main zopangira
ABS, brominated triazine, antimony trioxide, PTFE, antioxidants, lubricant, etc.
1.2.Zida zazikulu
Twin-screw extruder: mtundu wa SHJ-35;jekeseni akamaumba makina: T80 mtundu;makina oyeserera apakompyuta oyendetsedwa ndi makompyuta: mtundu wa CM6104;Chida choyezera kutentha kwa deformation: 303;Thermogravimetric (TG) analyzer: 209C mtundu.Pendulum impact tester: Model ZBC-25B;Chida chosungunuka chosungunuka (MFR): MPXRZ-40A;Choyesa choyaka chopingasa komanso choyima: Model HVR-2.
1.3.Kukonzekera kwachitsanzo
Dry ABS pa 80 ℃ kwa maola 3 mpaka 5, kenaka sakanizani ABS, brominated triazine, antimony trioxide, PTFE, ndi zina zowonjezera mofanana, sungunulani ndi kusakaniza kupyolera mu mapasa-screw extruder kwa extrusion ndi granulation.Extrusion kutentha ndi 215-225 ℃, wononga liwiro ndi 360 r/mphindi;Kenako amawomberedwa ndikuwumitsa pa 80 ℃ kwa maola 2, kenako amabayidwa muyeso wamba, kutentha kwa jekeseni ndi 200℃ 210 ℃.
1.4.Mayeso a magwiridwe antchito
Kuchita kuyaka: kuyesedwa molingana ndi UL94;magwiridwe antchito: kuyesedwa malinga ndi GB/T 1040-1992;kupinda mphamvu: kuyesedwa malinga ndi GB/T 9341-2000;mphamvu yamphamvu ya cantilever notch: kuyesedwa molingana ndi GB/T 1843-1996;MFR: malinga ndi GB/T 3682-==2000 mayeso, kutentha 220 ℃, katundu 220kg;kutentha kusokoneza kutentha: kuyesa malinga ndi GB/T 16341-2004;Kusanthula kwa TG: kutentha kwa 10. C / min,.Kutentha kwapakati ndi 30 ~ 700 ℃, pansi pa mpweya wa nayitrogeni.
2. Zotsatira ndi zokambirana
2.1.Chitsanzo chopanda choyimitsa moto chimayaka moto pambuyo poyatsira koyamba, ndipo zotsatira za retardant lalawi ndizosauka.Pamene kuchuluka kwa brominated triazine ndi antimony trioxide flame retardant kuwonjezeredwa, mphamvu yowonongeka yamoto ikuwoneka bwino, ndipo mulingo wa retardant wamoto umafika pamlingo wa UL94V-2, koma nthawi yoyaka ndi yotalikirapo, ndipo mphamvu yobwezeretsanso lawi sichinafikebe. chabwino.Kuwonjezera kwa PTFE kumafupikitsa kwambiri nthawi yoyaka moto.0.2% PTFE ikawonjezedwa, kuchuluka kwa zinthuzo kumawonjezeka kuchokera ku V-2 mpaka V-0.Izi ndichifukwa choti PTFE ili ndi malo osungunuka kwambiri (323 ° C), ndipo sichisungunuka pa kutentha kwa zinthu, koma n'zosavuta kupanga fibrillate kupanga fiber network pansi pa kusakaniza kukameta ubweya wa mphamvu, zomwe zimachepetsa kufalikira kwa moto.
2.2.Pambuyo powonjezera chotsitsa chamoto, mphamvu yamphamvu yamtunduwu imatsika kwambiri, pomwe zida zina zamakina zimasintha pang'ono.Mosiyana ndi zimenezi, pamene lawi retardants ndi PTFE anawonjezera pa nthawi yomweyo, kulimba kwa zinthu pang'ono bwino poyerekeza ndi ntchito retardants lawi yekha, ndipo kuchuluka kwa PTFE ukuwonjezeka, ndi notche mphamvu mphamvu ya zinthu komanso kumawonjezera, chomwe chingakhale Chingwe cha fiber network chopangidwa ndi PTFE muzinthuzo chimakhala ndi gawo lolimbikitsa kwambiri.
2.3.Pamene kuchuluka kwa PTFE kumawonjezeka, MFR ya zinthuzo imachepa pang'onopang'ono.Pamene kuchuluka kwa PTFE anawonjezera ndi 0.3%, ndi MFR wa lawi retardant ABS amachepetsa kuchokera 23.1g/10min kuti 14.5g/10min, kusonyeza zotsatira za PTFE pa otaya katundu wa zinthu.Chokulirapo chimakhala makamaka chifukwa cha kukhalapo kwa PTFE fiber-forming material, yomwe imalepheretsa kuyenda kwa mamolekyu a ABS.Chifukwa cha mawonekedwe apadera opangidwa ndi PTFE panthawi yokonza, zolembera zakuthupi zimawoneka kuti zimatupa pakutuluka kwa chingwecho, zomwe zimapangitsa kuti zikhale zokulirapo komanso kutsitsa pang'onopang'ono.Extrusion wa zipangizo popanda PTFE zambiri zachilendo.
2.4.TG ndi DTG kusanthula kwazinthu
Pali nsonga imodzi yokha ya kuwonda matenthedwe m`kati matenthedwe kuwonda kwa koyera ABS, ndi nsonga ziwiri za kuwonda matenthedwe amaonekera m`kati matenthedwe kuwonda kwa lawi retardant ABS.Pachimake choyamba chimayamba chifukwa cha kuwonongeka kwa flame retardant, ndipo nsonga yachiwiri imayamba chifukwa cha kuwonongeka kwa ABS.Ndi kuwonjezera kwa PTFE, kutentha kwakukulu kwa kutentha kwa thupi (427 ° C) kwa ABS ndi 1.8 ° C pamwamba kuposa ABS yoyera (428.8 ° C), koma kusiyana kwakukulu kwa kutentha kwa thupi (kutayika kwa kutentha kwakukulu) ( 11.7% / min) yokha Kusiyanitsa kwakukulu kwa kutentha kwa kutentha kwa ABS (18.8% / min) ndi 62.2%, yomwe ndi 7.9% yotsika kusiyana ndi kusiyana kwakukulu kwa kutentha kwa thupi (12.7% / min) ya chitsanzo 28 popanda PTFE yawonjezeredwa.Kuphatikizika kwa PTFE kumatha kusintha magwiridwe antchito amoto.
Bromotriazine ndi antimony trioxide ndizofanana ndi halogen-antimony retardants, zomwe sizimangosintha gawo la gasi retardant retardant komanso kusintha momwe kutentha kumayendera pagawo lopindika.Mpweya wotsalira wa carbon wa ABS woyera pa 700 ℃ ndi 1.2%, ndi ABS yoletsa moto yamoto yokhala ndi brominated triazine ndi antimony trioxide imawonjezedwa.Mlingo wotsalira wa kaboni pa 700 ℃ ndi 3.5%.Mapangidwe a carbon layer amathandizanso kuonjezera kukana kwa zinthu.Kupsa mtima.Panthawi imodzimodziyo, mlingo wotsalira wa carbon pa 700 ° C ndi PTFE anawonjezera anali 3.6%, kusonyeza kuti PTFE inalephera kulimbikitsa mapangidwe a carbon.Kuwonjezera kwa PTFE kungalimbikitse mawonekedwe osakanikirana a carbon ndi kusungunula bwino ndi zotchinga za okosijeni, motero Amagwiritsidwa ntchito ndi halogen-antimony flame retardant, mphamvu yowonongeka yamoto imakhala yabwino kwambiri.
3. Mapeto
3.1.Kuwonjezera kwa PTFE kungathenso kuchepetsa nsonga ya nsonga ya kutentha kwa kutentha kwa ABS yoyaka moto, kuchepetsa kwambiri nthawi yoyaka zinthuzo, ndikusintha kalasi yoyaka moto yazinthuzo.
3.2.Kuwonjezera PTFE ali ndi mphamvu pang'ono pa mawotchi zimatha lawi retardant ABS, ndi kumlingo bwino ndi toughness wa zinthu.
3.3.PTFE zimakhudza kwambiri ntchito processing wa lawi retardant zipangizo ABS, ndi mlingo ayenera kusinthidwa malinga ndi zosowa pa ntchito.
Nthawi yotumiza: Jun-11-2020