Zogulitsa za Polyimide Nonwoven Nsalu

I. Makhalidwe Aakulu a Nsalu Yopanda Ulusi ya Polyimide: Yogwira Ntchito Kwambiri M'malo Ovuta Kwambiri

Pogwiritsa ntchito ubwino wa zinthu za PI komanso makhalidwe apadera a njira yogwiritsira ntchito madzi, nsalu ya polyimide yopanda ulusi imawonetsa makhalidwe atatu akuluakulu omwe amagonjetsa zolepheretsa za ulusi wamba wachilengedwe ndi wachilengedwe m'malo otentha kwambiri, oletsa moto, olimbana ndi nyengo, komanso ogwirizana ndi ntchito:

1. Kukhazikika pa Kutentha Kwambiri + Kubwerera kwa Moto Mkati: Chotchinga Choteteza Malo Omwe Ali Pangozi Kwambiri

Kukana kutentha kwambiri poyerekeza ndi zipangizo zachizolowezi: Mosiyana ndi aramid (kutentha kwa nthawi yayitali: 204°C) ndi PTFE (kutentha kwa nthawi yayitali: 260°C), polyimide imasunga umphumphu wa kapangidwe kake ikagwiritsidwa ntchito mosalekeza pa 260°C, ndipo imatha kupirira kutentha kwa nthawi yochepa mpaka 400°C. Kapangidwe ka ulusi wolumikizidwa ndi hydroentangled sikawonongeka, ndipo sikusonyeza zizindikiro zakukalamba kapena kuwonongeka patatha zaka zoposa 1.5 kakugwiritsidwa ntchito mosalekeza monga kutentha zinyalala ndi malo otentha kwambiri a zitsulo, zomwe zimapangitsa kuti ntchitoyo ikhale yoposa katatu kuposa ya zinthu za aramid.

Kuletsa moto kwapamwamba: Popanda kufunikira zowonjezera zoletsa moto, zinthuzo zimapeza index yocheperako ya oxygen (LOI) ya 38% (yomwe imaposa 28% ya PTFE ndi 29%) ya aramid. Sizimayatsa kapena kusungunuka zikakumana ndi moto, zimazimitsa zokha nthawi yomweyo moto ukachotsedwa, ndipo sizitulutsa mpweya woipa panthawi yoyaka. Izi zimaletsa bwino kufalikira kwa moto, zomwe zimathandiza kuthetsa mavuto akuluakulu a zinthu zakale zoletsa moto monga kuvulala komwe kumabwera chifukwa cha kusungunuka ndi kutulutsa utsi woopsa.

2. Kukana Kwathunthu kwa Nyengo + Kukhazikika kwa Makina: Chida Cholimba cha Mikhalidwe Yovuta

Kukana dzimbiri ndi ukalamba kwapadera: Nsaluyi imalimbana bwino ndi zinthu zambiri zochokera ku asidi (monga 10% sulfuric acid, 15% sodium hydroxide), zinthu zosungunulira zachilengedwe, ndi kuwala kwa UV, ndipo mphamvu yake yolimba imachepa ndi ≤8% patatha masiku 60 atamizidwa. Siziwonetsa kuuma kapena kuwonongeka chifukwa cha kuwala kwa dzuwa, chinyezi, ndi kutentha kwa nthawi yayitali, zomwe zimapangitsa kuti ikhale ya zaka 8-10 mu mphamvu ya nyukiliya komanso ntchito zaukadaulo wakunja—kuposa nthawi 10 kuposa zinthu wamba za polyester.

Makhalidwe abwino kwambiri a makina: Ndi kuchuluka kwa ulusi wa 1.41 g/cm³ ndi mphamvu yosweka ya 600 N/5×20 cm, imapereka mphamvu yowirikiza 20 kuposa nsalu ya polypropylene pa kulemera komweko. Pambuyo pa hydroentanglement, kukana kwa kung'ambika kumafika ≥50 N, ndi mphamvu yonyowa 100%. Izi zimathetsa kufooka kwa kutentha kwa ulusi wa basalt komanso mphamvu yosakwanira ya makina ya PTFE, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito popondereza katundu wolemera komanso mphamvu.

3. Kugwirizana kwa Ntchito + Kusinthasintha kwa Ntchito: Maziko Osiyanasiyana Osinthira Zinthu

Kutsekeka kwa madzi kumasunga ntchito ya zinthu: Njira yopangira spunlace yothamanga kwambiri imatsimikizira kutsekeka kwa ulusi wofewa popanda kuwonongeka komwe kumachitika chifukwa cha kubowola singano. Chogulitsacho chimakhala chofewa (kuuma ≤50 Shore A) chokhala ndi nsalu yabwino kwambiri, zomwe zimathandiza kudula mwachindunji, kusoka, ndi thermoforming. Izi zimathetsa mavuto okonza singano zachikhalidwe za PI, zomwe nthawi zambiri zimakhala zolimba komanso zofooka, pomwe zimapereka malo osalala, opanda burr oyenera kuphatikiza zigawo molondola.

Kuthekera kwakukulu kogwira ntchito: Kudzera mu kusintha kwa pamwamba kapena njira zopangira zinthu zosiyanasiyana, nsaluyi imatha kukhala ndi magwiridwe antchito ambiri apamwamba. Mwachitsanzo, pambuyo pokonza ndi kuyika zinthu ndi Fe₃O₄ ndi Ag nanoparticles, imapeza mphamvu yoteteza maginito (77 dB) komanso kuwunikira kochepa kwambiri (≤-10 dB). Ikaphatikizidwa ndi nanofibers, imawonetsa kusefa kutentha kwambiri komanso mphamvu zotsutsana ndi mabakiteriya, ikukwaniritsa zofunikira zosiyanasiyana pakubisala kwankhondo komanso kugwiritsa ntchito mankhwala apamwamba kwambiri.

II. Magawo Oyambira Ogwiritsira Ntchito Nsalu Yopanda Ulusi ya Polyimide: Mayankho Osasinthika a Zochitika Zapamwamba

Kutengera ndi makhalidwe omwe ali pamwambapa, nsalu yopanda nsalu ya polyimide yakhala chinthu chofunikira kwambiri pakusefa kutentha kwambiri, chitetezo chapadera, zamagetsi/zankhondo, komanso madera azachipatala apamwamba, zomwe zimagwira ntchito zomwe zimakhala zoopsa kwambiri, zomwe zimafunidwa kwambiri, komanso zomwe zimakhala nthawi yayitali:

1. Kusefa Kotentha Kwambiri ndi Kuteteza Chilengedwe: Njira Yoyambira Yoyeretsera Matenda Oopsa

Kusefa mpweya wotentha kwambiri: Kugwiritsidwa ntchito m'matumba osefa opangira zinyalala ndi zosefera zochotsera fumbi m'mafakitale opangira magetsi opangidwa ndi malasha, nsaluyi imagwira bwino fumbi laling'ono ndi tinthu towononga pa 300°C, ndi kulondola kwa kusefa kwa 0.5 μm. LOI yake yayikulu (38%) imaletsa zoopsa zoyaka zomwe zimachitika chifukwa cha potaziyamu ndi sodium mu phulusa la ntchentche, zomwe zimapangitsa kuti ntchito yake ikhale yolimba kuwirikiza kawiri kuposa zinthu zosefera za PPS.

Kusefa kwa kutentha kwambiri kwa mafakitale: Ntchito zake zikuphatikizapo nsalu zosefera zotulutsira mpweya wa malo osakaniza phula ndi matumba osefera zosefera zosungunulira kutentha kwambiri m'mafakitale a mankhwala. Nsaluyi imapirira kutentha kwa 260°C ndi dzimbiri la zosungunulira zachilengedwe, siimayamwa zinthu zosefera, imaonetsetsa kuti zinthuzo ndi zoyera, ndipo imateteza bwino kwambiri kutsekeka kwa zinthu, kuchepetsa kukana kusefera ndi 30% poyerekeza ndi zosefera zagalasi zachikhalidwe.

2. Chitetezo ndi Zapadera: Njira Yothandizira Pazochitika Zoopsa Kwambiri

Zipangizo zodzitetezera: Zogwiritsidwa ntchito ngati nsalu yopangira zovala zosapsa ndi moto komanso nsalu zotetezera kutentha kwa ozimitsa moto, nsaluyo imasunga mawonekedwe ake pa 260°C, yokhala ndi kutentha kwa 0.03 W/(m·K yokha), zomwe zimaletsa bwino kuwala kwa kutentha kwambiri. Kapangidwe kake kofewa komanso kopumira kamapereka chitonthozo chachikulu kuposa zinthu zachikhalidwe za ubweya wa miyala, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito kutentha kwambiri pakupanga zitsulo ndi kuzimitsa moto.

Zinthu zotetezera zadzidzidzi: Zomwe zimagwiritsidwa ntchito zimaphatikizapo nsalu ya hema yosapsa ndi moto komanso zotchingira moto m'malo omwe ali pachiwopsezo chachikulu. Zinthu zomwe zimapsa moto komanso zosapsa ndi mphepo sizimawonongeka ndi chinyezi chakunja, kutentha, kapena kuwala kwamphamvu kwa UV, zomwe zimagwira ntchito ngati chotchinga chokhazikika cholimba. Kukula kwake kopapatiza kumalola kuyikidwa mwachangu pazidzidzidzi, koyenera kubisa zida zankhondo komanso kuthana ndi mankhwala.

3. Kugwiritsa Ntchito Zamagetsi ndi Zankhondo: Chigawo Chachikulu cha Zipangizo Zapamwamba

Zipangizo zotetezera maginito: Zogwiritsidwa ntchito mu nsalu zobisika za radar komanso zotetezera maginito pazida zamagetsi, nsaluyi imayamwa bwino maginito amagetsi kudzera mu broadband ya 8.2–40 GHz pambuyo poyika maginito ndi siliva wopanda magetsi, ndipo chitetezo chake chimafika pa 77 dB. Chimasunga magwiridwe antchito okhazikika pa 250°C, kuteteza zida zankhondo ku kusokonezedwa ndi maginito komanso kulola kubisa kwa infrared.

Zinthu zotetezera kutentha kwambiri: Ntchito zake zikuphatikizapo zotetezera kutentha kwa injini za ndege ndi nsalu yophimba zinthu zamagetsi zapamwamba. Ndi mphamvu ya dielectric ≥25 kV/mm pa 260°C komanso yopanda kuwonongeka kwa ntchito yotetezera kutentha, nsaluyi imalimbana ndi dzimbiri chifukwa cha mafuta ndi mafuta, kuletsa ma short circuits m'zinthu zamagetsi ndikukwaniritsa zosowa za makampani opanga ndege ndi magalimoto apamwamba.

4. Nsalu Zachipatala ndi Zapamwamba: Kuonetsetsa Kuti Zinthu Zili Zotetezeka Ndi Zaukhondo

Zinthu zoteteza kuchipatala: Zogwiritsidwa ntchito m'magauni ochitira opaleshoni otenthedwa kwambiri komanso m'magawo ophikira osapsa, zinthuzi zimapereka mgwirizano wabwino kwambiri (osayambitsa ziwengo, osakwiyitsa) ndipo zimapirira kuyeretsa kwa nthunzi kwa 134°C popanda kutayika kwa ulusi, mogwirizana ndi miyezo ya GMP yosapsa. Zimaonetsetsa kuti chitetezo cha ntchito chikugwira ntchito bwino pazochitika zachipatala zapamwamba monga kuyika ziwalo ndi opaleshoni yochepa kwambiri.

Nsalu zogwira ntchito: Zogwiritsidwa ntchito zimaphatikizapo masuti osayaka moto a mpikisano ndi zovala zoteteza makampani opanga zida za nyukiliya. Nsaluyi yotha kuyaka nthawi zonse, yopumira, komanso yabwino siimayambitsa kuyabwa pakhungu ikagwiritsidwa ntchito kwa nthawi yayitali. Imalimbananso ndi kuwala kwa dzuwa ndi dzimbiri la mankhwala, kuteteza antchito ku kutentha ndi kukhudzidwa ndi kuwala kwa dzuwa m'malo apadera monga masewera a magalimoto ndi kukonza mphamvu za nyukiliya.

Zokhudza Yongdeli: Katswiri Wopanga Nsalu Zosalukidwa za Polyimide

Changshu Yongdeli Spunlaced Nonwoven Co., Ltd. imagwiritsa ntchito mizere yopangira yokha nsalu zopanda nsalu za polyimide, kupereka zinthu zopangidwa mwamakonda zokhala ndi kulemera kuyambira 60–500 g/㎡ ndi m'lifupi mwa 0.2–3.2 m. Kampaniyo imaperekanso njira zina zochizira pambuyo pa chithandizo kuphatikizapo utoto wa maginito, kupanga nanofiber, ndi kuyimitsa/kukonza.

Kuti mupeze zitsanzo za malonda kapena mayankho osinthidwa, chonde titumizireni uthenga.