Nsalu zopanda nsalu za polypropylene (PP) zimagwiritsidwa ntchito kwambiri chifukwa cha ntchito zake zabwino, njira zosavuta zopangira, komanso mtengo wotsika. Makamaka m'zaka zaposachedwa, yakhala ikugwiritsidwa ntchito kwambiri m'magawo monga chisamaliro chaumoyo, zovala, zonyamula katundu, zopukuta, zida zaulimi, ma geotextiles, zida zosefera mafakitale, ndi zina zambiri, ndipo ili ndi njira yosinthira zida zake zakale.
Chifukwa cha mawonekedwe osakhala a polar a PP, omwe kwenikweni alibe magulu a hydrophilic, PP yopanda nsalu ilibe ntchito yoyamwa madzi. Kusintha kwa hydrophilic kapena kumaliza ndikofunikira kuti mupange nsalu za hydrophilic PP zopanda nsalu.
I. Njira yokonzekera nsalu za hydrophilic zopanda nsalu
Pofuna kukonza hydrophilicity ya nsalu za PP zopanda nsalu, nthawi zambiri pamakhala njira ziwiri zowonjezeretsa kunyowa kwawo: kusintha kwa thupi ndi kusintha kwa mankhwala.
Kusintha kwa Chemical makamaka kumasintha kapangidwe ka maselo a PP ndikuwonjezera magulu a hydrophilic kumaketani a macromolecular, potero amasintha hygroscopicity yake. Pali makamaka njira monga copolymerization, grafting, cross-linking, ndi klorination.
Kusintha kwa thupi makamaka kumasintha mawonekedwe apamwamba a mamolekyu kuti apititse patsogolo hydrophilicity, makamaka kupyolera mu kusakaniza kusinthidwa (asanayambe kupota) ndi kusinthidwa pamwamba (pambuyo pa kupota).
II. Kusintha kosakanikirana (kuzungulira koyambirira)
Malinga ndi nthawi zosiyanasiyana zowonjezera zowonjezera zosinthidwa, zitha kugawidwa m'njira ya masterbatch, njira yonse ya granulation, ndi njira yojambulira wopangira spin.
(1) Wamba mtundu masterbatch njira
Iyi ndi njira yofunikira yopangira nsalu zopanda hydrophilic zopangidwa ndi opanga nsalu zopanda nsalu.
Choyamba, zowonjezera zowonjezera za hydrophilic zimapangidwa kukhala tinthu tating'onoting'ono ta jellyfish ndi opanga matabwa, kenako ndikusakanikirana ndi PP kupota kuti apange nsalu.
Ubwino: Kupanga kosavuta, palibe chifukwa chowonjezera zida zilizonse, zoyenera kupanga ng'ombe zazing'ono, kuphatikiza kulimba kwake kwamphamvu kwa hydrophilic.
Zoipa: Kuchepa kwa hydrophilicity komanso kusagwira bwino ntchito, komwe kumagwiritsidwa ntchito popota nsalu. Mtengo wapamwamba, 2 mpaka 3 nthawi zambiri kuposa kusinthidwa kwapamwamba.
Kusakhazikika kwa spinnability kumafuna kusintha kwa ndondomekoyi. Makasitomala ena adataya matani 5 a nsalu kuchokera kumafakitole awiri a masterbatch osapanga zinthu zomalizidwa.
(2) Njira yonse ya granulation
Sakanizani chosinthira, magawo a PP, ndi zowonjezera mofanana, sungani pansi pa screw kuti mupange tinthu tating'ono ta hydrophilic PP, kenako sungunulani ndikuzikulunga munsalu.
Ubwino: Kukonzekera bwino, zotsatira zokhalitsa, ndi nsalu zogwiritsidwanso ntchito.
Zoipa: Zida zowonjezera wononga extruder zimafunikira, zomwe zimapangitsa kuti pakhale mtengo wokwera pa tani imodzi komanso hydrophilicity pang'onopang'ono, ndikupangitsa kuti ikhale yoyenera kupanga zazikulu.
(3) Jakisoni wa Fangqian
Onjezani mwachindunji ma reagents a hydrophilic, mwachitsanzo ma polima a hydrophilic, ku zomangira zazikulu za nsalu zosalukidwa ndikusakaniza ndi PP kusungunula kuti azipota molunjika.
Ubwino wake: Zotsatira zake zimakhala zokhalitsa ndipo nsaluyo imatha kugwiritsidwanso ntchito.
Zoipa: Chifukwa cholephera kusakaniza mofanana, kupota nthawi zambiri kumakhala kovuta komanso kopanda kuyenda.
III. Kumaliza kwa hydrophilic (pambuyo pozungulira chithandizo)
Hydrophilic finishing ndi njira yosavuta, yothandiza, komanso yotsika mtengo yopangira nsalu zopanda nsalu za hydrophilic. Ambiri mwa opanga nsalu zopanda nsalu makamaka amagwiritsa ntchito njirayi. Njira yayikulu ndi iyi:
Nsalu zapaintaneti za spunbond zosalukidwa - zokutira kapena kupopera madzi hydrophilic wothandizira - infuraredi kapena mpweya wotentha
Ubwino: Palibe zovuta za spinnability, kuthamanga kwa hydrophilic kwa nsalu yopanda nsalu, kuchita bwino kwambiri, mtengo wotsika, ndi 1/2-1/3 ya mtengo wamtundu wamba wa masterbatch. Zoyenera kupanga zazikulu;
Kuipa: Pamafunika kugula zida zosiyana zapambuyo pokonza, zomwe ndi zodula. Pambuyo kutsuka katatu, nthawi yolowera madzi imawonjezeka pafupifupi ka 15. Kulephera kukwaniritsa zofunikira kuti mugwiritsenso ntchito;
Kupanga kwakukulu;
Ubwino ndi kuipa kwa njira imeneyi zimasonyeza kuti makamaka ntchito disposable mankhwala amafuna permeability mkulu ndi hydrophilicity, monga zipangizo ukhondo, matewera, ukhondo zopukutira, etc.
Ⅳ.Kugwiritsa Ntchito Complex Hydrophilic Particle PPS03 Njira
Poganizira ubwino ndi kuipa kwa (-) ndi (ii) njira, gulu la hydrophilic mother particle PPS030 linapangidwa.
Mtundu wa jellyfish tinthu tating'ono tating'ono tating'onoting'ono tating'onoting'ono (ofanana ndi tinthu tating'onoting'ono ta jellyfish), kufulumira, kufalikira mwachangu, zotsatira zabwino, zotsatira zokhalitsa, kukana kutsuka bwino, koma mtengo wokwera pang'ono (wofanana ndi tinthu tating'ono ta jellyfish).
Zabwino spinnability, palibe chifukwa chosinthira kupanga.
Zoyenera kupanga magulu ang'onoang'ono komanso kukana kutsuka kwakukulu, zinthu zogwiritsidwanso ntchito monga nkhalango ndi nsalu zaulimi.
Zizindikiro zazikulu zowunikira za hydrophilic PP zopanda nsalu zimaphatikizapo kuyamwa kwamadzi, ngodya yolumikizana, ndi capillary effect.
(1) Mayamwidwe amadzi: amatanthawuza kuchuluka kwa madzi omwe amamwedwa pagawo lililonse la nsalu ya hydrophilic nonwoven mkati mwa nthawi yokhazikika kapena nthawi yofunikira kuti munyowetse zinthuzo. Kuchuluka kwa mayamwidwe amadzi, zotsatira zake zimakhala bwino.
(2) Njira yolumikizirana: Ikani nsalu ya hydrophilic PP yopanda nsalu pa mbale yoyera komanso yosalala yagalasi, ikani pansi pa uvuni, ndikuyisiya kuti isungunuke. Mukasungunuka, chotsani mbale yagalasi ndikuziziritsa mwachibadwa mpaka kutentha. Yezerani mbali yolumikizirana yolumikizana pogwiritsa ntchito njira zoyesera zolunjika. Zing'onozing'ono zolumikizana nazo, zimakhala bwino. (PP sanali nsalu nsalu popanda mankhwala hydrophilic atafika pafupifupi 148 ° C).
Nthawi yotumiza: Dec-04-2023