Ntchito ya pre-oxygenated filament sanali nsalu nsalu

Pre-oxidized Polyacrylonitrile Fiber Nonwoven (yofupikitsidwa ngati PAN pre-oxidized fiber nonwoven) ndi nsalu yopanda ntchito yopangidwa kuchokera ku polyacrylonitrile (PAN) kupyolera mu mankhwala ozungulira ndi oxidation. Zina zake zazikulu zimaphatikizira kukana kutentha kwambiri, kuchedwa kwamoto, kukana dzimbiri ndi mphamvu zina zamakina. Komanso, sichisungunuka kapena kudontha pa kutentha kwakukulu koma kokha carbonizes pang'onopang'ono. Choncho, amagwiritsidwa ntchito kwambiri pazochitika zomwe zimakhala ndi zofunikira kwambiri pachitetezo komanso kukana nyengo. Zotsatirazi zikupereka kufotokozera mwatsatanetsatane kuchokera m'magawo angapo ogwiritsira ntchito, kukhudzana ndi zochitika zogwiritsira ntchito, ntchito zazikuluzikulu, ndi mafomu azogulitsa:

1. Chitetezo cha moto ndi malo opulumutsa mwadzidzidzi

Chitetezo cha moto ndi chimodzi mwazinthu zofunika kwambiri zogwiritsira ntchito nsalu zokhala ndi okosijeni zomwe sizinawombedwe. Zomwe zimawotcha moto komanso kutentha kwambiri zimatha kutsimikizira chitetezo cha ogwira ntchito. Mafomu ofunsira kwambiri ndi awa:

Wosanjikiza wamkati / wotsekereza kutentha kwa zovala zoteteza moto

Zovala zamoto ziyenera kukwaniritsa zofunikira zonse ziwiri za "flame retardancy" ndi "kutchinjiriza kutentha" : wosanjikiza wakunja nthawi zambiri amagwiritsa ntchito nsalu zotchinga moto zamphamvu kwambiri monga aramid, pomwe gawo lapakati la kutentha kwapakati limagwiritsa ntchito kwambiri ulusi wopangidwa kale ndi okosijeni wopanda nsalu. Imatha kukhala okhazikika pamatenthedwe a 200-300 ℃, kutsekereza bwino kutentha kwa malawi, ndikuletsa khungu la ozimitsa moto kuti lisatenthedwe. Ngakhale zitayatsidwa ndi malawi otseguka, sizingasungunuke kapena kudontha (mosiyana ndi ulusi wamba wamankhwala), kuchepetsa chiopsezo cha kuvulala kwachiwiri.

Zindikirani:The kachulukidwe pamwamba pa oxidized filament sanali nsalu nsalu (nthawi zambiri 30-100g/㎡) akhoza kusintha malinga ndi mlingo chitetezo. Zogulitsa zomwe zimakhala ndi kachulukidwe wapamwamba kwambiri zimakhala ndi zotsatira zabwino zotchinjiriza kutentha.

Zothandizira zothawa mwadzidzidzi

➤ Chofunda chozimitsira moto: Zida zozimitsa moto m’nyumba, m’malo ogulitsira zinthu, njanji zapansi panthaka ndi malo ena. Amapangidwa ndi ulusi wopangidwa ndi okosijeni wopanda nsalu komanso ulusi wagalasi. Ikapsa ndi moto, imapanga "chotchinga chotchinga moto" mwachangu, kuphimba thupi la munthu kapena kukulunga zinthu zoyaka moto kuti izilekanitsa mpweya ndikuzimitsa moto.

➤Chigoba cha kumaso chotchinga moto/chopumira: Pamoto, utsi uli ndi mpweya wambiri wapoizoni. Nsalu zokhala ndi okosijeni zosalukidwa zitha kugwiritsidwa ntchito ngati maziko a zosefera za utsi za chigoba cha kumaso. Kapangidwe kake kopanda kutentha kwambiri kumatha kulepheretsa kuti zinthu zosefera zisalephere kutentha kwambiri. Kuphatikizidwa ndi wosanjikiza wopangidwa ndi mpweya, imatha kusefa tinthu tapoizoni.

2. Malo otetezedwa ndi mafakitale apamwamba kwambiri

M'mafakitale, malo owopsa monga kutentha kwambiri, dzimbiri, ndi mikangano yamakina nthawi zambiri amakumana. Kukana kwa nyengo kwa nsalu yosakhala ndi okosijeni yopangidwa ndi okosijeni kumatha kuthetsa zovuta zowonongeka mosavuta komanso moyo waufupi wazinthu zachikhalidwe (monga thonje ndi ulusi wamba wamankhwala).

➤Kuteteza ndi kuteteza kutentha kwa mapaipi ndi zida zotentha kwambiri

Mapaipi otenthetsera kwambiri m'mafakitale amankhwala, zitsulo ndi magetsi (monga mapaipi a nthunzi ndi zitoliro zamoto) amafunikira zida zotchingira zakunja zomwe "zimatchinjiriza" komanso "zoteteza kutentha". Nsalu zokhala ndi okosijeni zomwe sizinawombedwe zimatha kupangidwa kukhala masikono kapena manja ndikukulunga molunjika pamwamba pa mipope. Kutsika kwake kwamafuta otsika (pafupifupi 0.03-0.05W / (m · K)) kungachepetse kutentha kwa kutentha ndikulepheretsa kuti malo otsekemera asatenthedwe kutentha kwambiri (zigawo zamtundu wa rock wool insulation zimakonda kuyamwa chinyezi ndikupanga fumbi lambiri, pamene ulusi wopangidwa ndi okosijeni usanawombedwe umakhala wopepuka komanso wopanda fumbi).

Zida zosefera mafakitale (kusefera kwa gasi wotentha kwambiri)

Kutentha kwa gasi wa flue kuchokera ku zomera zopsereza zinyalala ndi mphero zachitsulo zimatha kufika 150-250 ℃, ndipo zimakhala ndi mpweya wa acidic (monga HCl, SO₂). Nsalu zosefera wamba (monga poliyesitala, polypropylene) zimatha kufewetsa komanso dzimbiri. Nsalu zokhala ndi okosijeni zomwe sizinawoluke zimakhala ndi asidi amphamvu komanso kukana kwa alkali ndipo zimatha kupangidwa kukhala matumba osefera kuti zisefe mpweya wotentha kwambiri. Nthawi yomweyo, imakhala ndi mphamvu yosungira fumbi ndipo nthawi zambiri imaphatikizidwa ndi zokutira za PTFE (polytetrafluoroethylene) kuti zithandizire kukana dzimbiri.

➤Gasket yoteteza makina

Pakati pa zipolopolo zakunja ndi zigawo zamkati za zipangizo zotentha kwambiri monga injini ndi ma boilers, zipangizo za gasket zimafunika kuti zilekanitse kugwedezeka ndi kutentha kwakukulu. Nsalu zokhala ndi okosijeni zomwe sizinawoluke zimatha kupangidwa kukhala ma gaskets osindikizidwa. Kukana kwake kutentha kwambiri (kutentha kwa nthawi yayitali ≤280 ℃) kungalepheretse ma gaskets kukalamba ndi kupunduka panthawi yogwiritsira ntchito zipangizo, komanso nthawi yomweyo kugwedezeka kwa makina.

3. Electronics ndi New Energy Fields

Zamagetsi ndi zatsopano zamagetsi zimakhala ndi zofunika kwambiri pa "flame retardancy" ndi "insulation" ya zida. Nsalu zokhala ndi okosijeni zosalukidwa zimatha kulowa m'malo mwa zida zachikhalidwe zoletsa moto (monga thonje loletsa moto ndi nsalu zamagalasi).

➤ Cholekanitsa chosagwira moto/chotchingira kutentha kwa mabatire a lithiamu

Mabatire a lithiamu (makamaka mabatire amphamvu) amakonda "kuthawa chifukwa cha kutentha" akamangidwa kapena kufupikitsidwa, kutentha kumakwera mwadzidzidzi kupitilira 300 ℃. Pre-oxygenated filament sanali nsalu nsalu angagwiritsidwe ntchito ngati "olekanitsa chitetezo" kwa mabatire lifiyamu, sandwiled pakati maelekitirodi zabwino ndi zoipa: ali ena kutchinjiriza katundu pa ntchito yachibadwa kuteteza madera yochepa pakati maelekitirodi zabwino ndi zoipa. Kuthamanga kwa kutentha kumachitika, sikusungunuka, kumatha kusunga umphumphu, kuchedwa kufalikira kwa kutentha, ndi kuchepetsa chiopsezo cha moto ndi kuphulika. Kuphatikiza apo, mkati mwa batire paketi ya batire imagwiritsanso ntchito nsalu zokhala ndi okosijeni zomwe sizinawombe ngati chotchinga chotchinga kuti chiteteze kutentha pakati pa ma cell a batri ndi casing.

➤Zida zotchingira zopakira pakompyuta

Kuyika kwa zida zamagetsi monga ma board ozungulira ndi ma transfoma kumafunika kukhala ndi insulated komanso kuletsa moto. Nsalu zokhala ndi okosijeni zomwe sizinawombedwe zitha kupangidwa kukhala zowonda (10-20g/㎡) zotchingira mapepala ndikumamatira pamwamba pazigawozo. Kukaniza kwake kwa kutentha kwambiri kumatha kutengera kutenthetsa komweko panthawi yogwiritsira ntchito zida zamagetsi (monga kutentha kwa thiransifoma ≤180 ℃), ndipo nthawi yomweyo kumakumana ndi UL94 V-0 retardant standard yoletsa mabwalo amfupi ndi moto wa zigawozo.

4. Minda ina yapadera

Kuphatikiza pa zomwe tazitchula pamwambapa, nsalu zokhala ndi okosijeni zomwe sizinawonjezeke zimagwiranso ntchito m'magawo ena apadera komanso apadera:

➤ Zamlengalenga: Zida zosakanikirana ndi kutentha kwambiri

Zida zophatikizika zopepuka komanso zolimbana ndi kutentha kwambiri zimafunikira m'zigawo za injini zandege ndi zida zodzitetezera ku matenthedwe a ndege. Nsalu zokhala ndi oxidized filament zopanda nsalu zimatha kugwiritsidwa ntchito ngati "preform", kuphatikiza ndi resins (monga phenolic resin) kuti apange zinthu zophatikizika. Pambuyo pa carbonization, imatha kupangidwanso kukhala zida zophatikizika za kaboni, zomwe zimagwiritsidwa ntchito m'zigawo zolimbana ndi kutentha kwambiri (monga mphuno ndi m'mphepete mwa mapiko) kuti zipirire kukokoloka kwa mpweya wotentha kwambiri umayenda pamwamba pa 500 ℃.

➤Kuteteza chilengedwe: Zida zosefera zinyalala zotentha kwambiri

Pochiza zotsalira zotentha kwambiri (zotentha pafupifupi 200-300 ℃) pambuyo pakuwotcha zinyalala zachipatala ndi zinyalala zowopsa, zida zosefera zimafunikira kuti zilekanitse zotsalira ndi gasi. Nsalu zokhala ndi okosijeni zosalukidwa zimakhala ndi dzimbiri zolimba ndipo zimatha kupangidwa kukhala zikwama zosefera kuti zisefe zotsalira zotentha kwambiri, kulepheretsa kuti zinthu zosefera zisachite dzimbiri komanso kulephera. Panthawi imodzimodziyo, katundu wake woletsa moto amalepheretsa zinthu zoyaka moto zomwe zili muzotsalira kuti ziwotche zosefera.

➤Zipangizo zodzitchinjiriza: Zida zama suti apadera

Kuphatikiza pa suti zozimitsa moto, zovala zogwirira ntchito zapadera monga zitsulo, kuwotcherera, ndi mafakitale amankhwala zimagwiritsanso ntchito nsalu zokhala ndi okosijeni zomwe sizinawombedwe ngati zomangira pazinthu zovalidwa mosavuta monga ma cuffs ndi khosi kuti zithandizire kuchedwa kwamoto komanso kukana kuvala, ndikuletsa kupsa mtima kuti zisayatse zovala panthawi yantchito.

Pomaliza, ntchito akamanena zaNsalu zokhala ndi okosijeni zomwe sizinalukidweyagona pakudalira mikhalidwe yake yayikulu ya "flame retardancy + high-temperature resistance" kuti athane ndi ngozi zachitetezo kapena kuperewera kwa magwiridwe antchito a zida zachikhalidwe m'malo ovuta kwambiri. Ndi kuwongolera kwa miyezo ya chitetezo m'mafakitale monga mphamvu zatsopano ndi kupanga kwapamwamba kwambiri, mawonekedwe ake ogwiritsira ntchito adzakulirakulirabe m'minda yoyengedwa komanso yowonjezereka (monga chitetezo cha zigawo za microelectronic ndi kusungunula kwa zida zosinthika zosungira mphamvu, etc.).