Phunzirani pakuwongoleredwa kwa kuchedwa kwamoto kwa PA66 ndi phosphorous wofiira wokutidwa ndi utomoni wosiyanasiyana

Nylon 66 ili ndi zida zabwino zamakina, kukana kuvala komanso kukana kwa dzimbiri, ndipo imagwiritsidwa ntchito kwambiri pamagalimoto, zamagetsi ndi zamagetsi. Komabe, PA66 ndi zinthu zoyaka moto, ndipo padzakhala dontho likayaka, lomwe lili ndi chiwopsezo chachikulu chachitetezo. Chifukwa chake, ndikofunikira kwambiri kuphunzira kusinthidwa koletsa moto kwa PA66. Makina oletsa malawi a PA66 omwe kale anali oyendetsedwa ndi zoletsa moto, koma zoziziritsa moto za brominated zakhala zikukumana ndi mavuto akulu oteteza chilengedwe ndi CTI.

Pakalipano, chowotcha chamoto cha phosphorous chofiyira chingagwiritsidwe ntchito pazida zotchingira moto PA66 chifukwa chakuchita bwino kwambiri kwamalawi ake komanso kukwera mtengo kwake. Komabe, wofiira phosphorous lawi retardants mu kutentha, mpweya, chinyezi mkulu ndi zamchere chilengedwe, zosavuta kuyamwa madzi, chifukwa zinthu acidification. Phosphoric acid idzawononga zigawo zachitsulo, zomwe zimapangitsa kuti magetsi apangidwe.

Pofuna kupewa acidification wa wofiira phosphorous anachita, kusintha bata la wofiira phosphorous, ndi kutali kwambiri njira ndi microcapsule TACHIMATA phosphorous wofiira, njira imeneyi ndi mwa situ polymerization, mu wofiira phosphorous ufa pamwamba. kupanga khola polima zakuthupi, kuti muthe kukhudzana ndi wofiira phosphorous ndi mpweya ndi madzi, ndi kuchepetsa acidification wa phosphorous wofiira, timapitiriza bata la ntchito zakuthupi.

Komabe, utomoni ❖ kuyanika osiyana ndi zotsatira zosiyana pa wofiira phosphorous lawi retardant analimbitsa nayiloni. Pakafukufukuyu, zoziziritsa moto za phosphorous zofiira zomwe zimakutidwa ndi utomoni wa phenolic ndi utomoni wa melamine zidasankhidwa kuti zifufuze zotsatira za zinthu ziwiri zosiyana zotsekera malawi pamitundu yosiyanasiyana ya zinthu zomwe zimalepheretsa malawi owonjezera a PA66.

The zikuchokera mfundo ndi motere: melamine utomoni wokutira wofiira phosphorous lawi retardant mbuye chuma (MC450), phenolic utomoni wokutira wofiira phosphorous lawi retardant mbuye chuma (PF450): wofiira phosphorous zili 50%. Mapangidwe a flame retardant retardant nayiloni 66 ndi 58% nayiloni 66, 12% flame retardant master material, 30% glass fiber.

Chokutidwa chofiira cha phosphorous chobwezeretsanso moto chowonjezera PA66 fomula

Pambuyo pa kusakaniza ndi kusinthidwa, gulu la PA66 / GF30 lopangidwa ndi phosphorous retardant wofiira lamoto linakonzedwa, ndipo katundu wokhudzana nawo anayesedwa motere.

1. Flame retardancy, kutentha kwa waya ndi wachibale creepage mark index

Zitha kuwoneka kuti onse PA66-1 # ndi PA66-2 # amatha kufikira giredi yoletsa moto ya 1.6mm V-0, ndipo zida sizimatsika pakayaka. Mitundu iwiri ya phosphorous yokutidwa ndi flame retardant PA66 ili ndi mphamvu yabwino yoletsa moto. The glow-wire flammability index (GWFI) ya PA66-1# ndi PA66-2# imatha kufika 960 ℃, ndipo GWIT imatha kufika 775 ℃. Kuchita kuyaka koyima ndi kuyesa kwa waya wonyezimira wa zida ziwiri zotchingira moto za phosphorous zokutira zimatha kufika pamlingo wabwino kwambiri.

Zitha kuwonekanso kuti PA66-1 ndiyokwera pang'ono kuposa CTI ya # PA66-2 #, ndipo CTI yazinthu ziwiri zofiira za phosphorous zokutidwa ndi flame retardant PA66 zili pamwamba pa 450V, zomwe zimatha kukwaniritsa zofunikira zamafakitale ambiri.

2. Katundu wamakina

Zimango katundu ndi zofunika zofunika katundu wa malawi retardant analimbitsa nayiloni ntchito.

Zitha kuwoneka kuti mphamvu zamakokedwe ndi mphamvu yopindika ya PA66-1 # ndizokwera, zomwe ndi 164 MPa ndi 256 MPa motsatana, 5% ndi 6% kuposa PA66-1 #. Mphamvu zosawerengeka komanso mphamvu zosawerengeka za PA66-1# zonse ndi zapamwamba, zomwe ndi 10.5kJ/m2 ndi 66.9 kJ/m2 motsatana, 3% ndi 21% kuposa za PA66-1#, motsatana. Zonse zamakina azinthu ziwiri zokutidwa ndi phosphorous wofiira ndizokwera, zomwe zimatha kukwaniritsa zofunikira zamagulu osiyanasiyana.

3. Maonekedwe ndi fungo

Zitha kuwoneka kuchokera kumitundu iwiri yamitundu yopangidwa ndi jekeseni yokutidwa ndi phosphorous yofiira kuti chowotcha chamoto chowonjezera PA66 (PA66-1 #) chokonzedwa ndi melamine resin yokutidwa ndi phosphorous yofiira imakhala yosalala pamwamba, yowala komanso yopanda ulusi woyandama. pamwamba. Mtundu wa pamwamba wa flame retardant wolimbikitsidwa PA66(PA66-2#) wokonzedwa ndi phenolic resin wokutidwa ndi phosphorous wofiira sanali yunifolomu ndipo panali ulusi woyandama wochulukirapo. Izi makamaka chifukwa melamine utomoni palokha ndi ufa wabwino kwambiri ndi yosalala, monga ❖ kuyanika wosanjikiza anayambitsa, adzakhala ndi gawo kondomu mu dongosolo lonse zakuthupi, kotero zinthu maonekedwe ndi yosalala, palibe CHIKWANGWANI zoonekeratu zoyandama.

Mitundu iwiri ya tinthu tating'ono tating'ono ta phosphorous tokutidwa ndi malawi owonjezera a PA66 tinayikidwa pa 80 ℃ kwa maola awiri, ndipo kukula kwake kwa fungo kunayesedwa. Pa66-1 # zinthu zili ndi fungo lodziwika bwino komanso fungo lamphamvu. Pa66-2 # ili ndi fungo laling'ono ndipo palibe fungo lodziwika bwino. Izi zimachitika makamaka chifukwa cha malo omwe apezeka polymerization, Amine adapanga mamolekyulu ang'onoang'ono siophweka kuchotsa, ndikununkhira kwa amitundu omweyo ndiwokulirapo.

4. Kuyamwa madzi

Chifukwa PA66 ili ndi magulu a amine ndi carbonyl, ndizosavuta kupanga zomangira za haidrojeni ndi mamolekyu amadzi, kotero zimakhala zosavuta kuyamwa madzi zikagwiritsidwa ntchito, zomwe zimapangitsa kuti pakhale pulasitiki, zomwe zimapangitsa kuti zinthu zichuluke, kutsika kwamphamvu, komanso kukwawa kodziwikiratu. nkhawa.

Mphamvu ya phosphorous yofiyira wofiyira wofiyira wofiyira wofiyira pamayamwidwe amadziwo idaphunziridwa poyesa kuyamwa kwamadzi kwazinthuzo. Zitha kuwoneka kuti kuyamwa kwamadzi kwazinthu ziwirizi kumawonjezeka ndi kuwonjezeka kwa nthawi. Kutenga madzi koyambirira kwa PA66-1 # ndi PA62-2 # ndikofanana, koma ndi kuwonjezeka kwa nthawi yamadzi, kuyamwa kwa madzi kwa zinthu zosiyanasiyana mwachiwonekere kumasiyana. Pakati pawo, phenolic utomoni wokutidwa wofiira phosphorous nayiloni retardant (PA66-2 #) ali ndi mlingo otsika mayamwidwe madzi 5.8% pambuyo masiku 90, pamene melamine utomoni wokutira wofiira phosphorous lawi retardant nayiloni (PA66-1 #) ali ndi madzi okwera pang'ono. mayamwidwe 6.4% pambuyo masiku 90. Izi makamaka chifukwa phenolic utomoni wokha madzi mayamwidwe mlingo wochepa, ndi melamine utomoni ndi mphamvu mayamwidwe madzi, hydrolysis kukana ndi osauka.

5. Kukana kwa dzimbiri kuchitsulo

Kuchokera zitsanzo akusowekapo ndi osiyana TACHIMATA wofiira phosphorous lawi retardant analimbitsa nayiloni chuma dzimbiri mu chithunzi akhoza kuona, osati kujowina, chitsanzo chopanda kanthu cha kusinthidwa nayiloni zitsulo pamwamba dzimbiri ndi zochepa, pali pang'ono mpweya ndi madzi dzimbiri nthunzi chifukwa cha chizindikiro, PA66-1 # ya dzimbiri zitsulo ndi zabwino ndithu, zitsulo pamwamba gloss bwino, mbali zochepa dzimbiri chochititsa dzimbiri, zitsulo dzimbiri PA66-2 # ndiye woopsa kwambiri, ndipo pamwamba pa chitsulo pepala anaipitsidwa kwathunthu. , pamene pamwamba pa chinsalu chamkuwa chachita dzimbiri ndi kusinthika mwachiwonekere. Izi zikuwonetsa kuti dzimbiri la melamine utomoni wokutidwa wofiira phosphorous lawi retardant nayiloni ndi zochepa kuposa phenolic utomoni wokutira wofiira phosphorous lawi retardant nayiloni.

Pomaliza, mitundu iwiri ya zida zotchingira moto za PA66 zotetezedwa ndi malawi zidakonzedwa ndikukutira phosphorous wofiira ndi utomoni wa melamine ndi utomoni wa phenolic. The mitundu iwiri ya zipangizo lawi-retardant akhoza kufika 1.6mmV-0, akhoza kudutsa 775 ℃ kuwala-waya poyatsira kutentha, ndi CTI akhoza kufika oposa 450V.

Kulimba kwamphamvu ndi kusinthika kwamphamvu kwa PA66 zidakulitsidwa ndi melamine yokutidwa ndi phosphorous yofiira, pomwe mphamvu ya PA66 inali yabwinoko ndi phosphorous yokutidwa ndi phenolic wofiira. Kuphatikiza apo, fungo la phenolic resin lokutidwa ndi phosphorous retardant yofiyira yamoto wowonjezera PA66 linali locheperako poyerekeza ndi zinthu zokutidwa ndi melamine, komanso kuchuluka kwa mayamwidwe amadzi kunali kotsika. Melamine utomoni wokutidwa ndi wofiira phosphorous flame retardant kumapangitsa maonekedwe a PA66 ndi dzimbiri zochepa ku zitsulo.

Buku lothandizira: Phunzirani za zomwe zimalepheretsa moto wa PA66 wokutidwa ndi phosphorous wofiira, zida za intaneti.