Posachedwa, zida za chigoba zalandira chidwi kwambiri, ndipo antchito athu a polima sanalepheretsedwe pankhondo yolimbana ndi mliriwu. Lero tikuwonetsa momwe zinthu za PP zosungunuka zimapangidwira.
Kufunika kwa msika kwa malo osungunuka kwambiri PP
Kusungunuka kwa polypropylene kumagwirizana kwambiri ndi kulemera kwake kwa maselo. Kulemera kwapakati pa molekyulu ya polypropylene resin yokonzedwa ndi Ziegler Natta catalytic system nthawi zambiri imakhala pakati pa 3 × 105 ndi 7 × 105. Mlozera wosungunula wa utomoni wa polypropylene nthawi zambiri umakhala wotsika, womwe umalepheretsa kugwiritsa ntchito kwawo.
Ndikukula kwachangu kwamakampani opanga ma fiber ndi makina opanga nsalu, makampani opanga nsalu osalukidwa akwera kwambiri. Mndandanda wa ubwino wa polypropylene umapangitsa kuti zikhale zopangira zopangira nsalu zopanda nsalu. Ndi chitukuko cha anthu, magawo ogwiritsira ntchito nsalu zosalukidwa amakhala otakasuka: m'munda wamankhwala ndi thanzi,nsalu zosalukidwaangagwiritsidwe ntchito kupanga mikanjo kudzipatula, masks, mikanjo opaleshoni, zopukutira akazi ukhondo, matewera ana, ndi zina zotero; Monga nyumba ndi zinthu za geotechnical, nsalu zosalukidwa zitha kugwiritsidwa ntchito potsekereza madzi, kumanga misewu, ndi ntchito zosungira madzi, kapena denga lapamwamba lomveka limatha kupangidwa pogwiritsa ntchito ukadaulo wa spunbond ndi singano. Utumiki wake umatalika nthawi 5-10 kuposa phula lachikhalidwe; Zosefera ndi imodzi mwazinthu zomwe zikukula mwachangu munsalu zosalukidwa, zomwe zitha kugwiritsidwa ntchito kusefera gasi ndi madzi m'mafakitale monga mankhwala, mankhwala, ndi chakudya, ndipo ali ndi mwayi wamsika waukulu; Kuonjezera apo, nsalu zopanda nsalu zingagwiritsidwe ntchito popanga zikopa zopangira, matumba, zovala zopangira zovala, nsalu zokongoletsera, ndi kupukuta nsalu pa moyo wa tsiku ndi tsiku ndi ntchito zapakhomo.
Chifukwa chakukula kosalekeza kwa nsalu zosalukidwa, zofunikira pakupanga ndikugwiritsa ntchito zikuchulukirachulukira, monga kusungunula kuphulika, kupanga mwachangu, ndi zinthu zoonda. Chifukwa chake, zofunikira pakukonza utomoni wa polypropylene, zopangira zazikulu zansalu zosalukidwa, zawonjezekanso; Kuphatikiza apo, kupanga kupota kothamanga kwambiri kapena ulusi wabwino wa denier polypropylene kumafunanso kuti utomoni wa polypropylene ukhale wabwino wosungunuka; Ma pigment ena omwe sangathe kupirira kutentha kwambiri amafuna kukonzedwa kwa polypropylene ngati chonyamulira pa kutentha kocheperako. Zonsezi zimafuna kugwiritsa ntchito ultra-high melt index polypropylene resin monga zopangira zomwe zingathe kukonzedwa ndi kutentha kochepa.
Zapadera za nsalu zosungunuka ndi high melt index polypropylene. Mlozera wosungunula umatanthawuza kuchuluka kwa zinthu zosungunuka zomwe zimadutsa mu capillary yokhazikika pamphindi khumi zilizonse. Zokulirapo mtengo, m'pamenenso processing fluidity wa zinthu. Mlozera wosungunuka wa polypropylene ukakhala wapamwamba, ulusi umawomberedwa bwino kwambiri, komanso kusefera kwa nsalu yopangidwa kusungunuka.
Njira yokonzekera high melt index polypropylene resin
Imodzi ndikuwongolera kulemera kwa ma cell ndi kugawa kwa ma cell a polypropylene powongolera njira ya polymerization, monga kugwiritsa ntchito njira zowonjezera kuchuluka kwa zoletsa monga haidrojeni kuti muchepetse kulemera kwa ma polima, potero kumawonjezera index yosungunuka. Njirayi imachepetsedwa ndi zinthu monga catalytic system ndi zochitika zomwe zimachitika, zomwe zimapangitsa kuti zikhale zovuta kuwongolera kukhazikika kwa index yosungunuka ndikukhazikitsa.
Yanshan Petrochemical yakhala ikugwiritsa ntchito zopangira zitsulo za metallocene polimitsira mwachindunji zinthu zosungunula zomwe zimasungunula zopitilira 1000 m'zaka zingapo zapitazi. Chifukwa chovuta kuwongolera bata, polymerization yayikulu sinachitike. Chiyambireni mliri chaka chino, Yanshan Petrochemical atengera controllable kuwonongeka polypropylene kusungunula kuwomba chuma kupanga ukadaulo kupangidwa mu 2010 kupanga polypropylene kusungunula kuwombedwa sanali nsalu nsalu zapadera zakuthupi pa February 12. Nthawi yomweyo, kuyezetsa mafakitale kunachitika pa chipangizocho pogwiritsa ntchito zida za metallocene. Chogulitsacho chapangidwa ndipo chikutumizidwa kwa ogwiritsa ntchito omwe akutsika kuti ayesedwe.
Njira ina ndikuwongolera kuwonongeka kwa polypropylene yomwe imapezeka kudzera mu polymerization wamba, kuchepetsa kulemera kwake kwa maselo ndikuwonjezera kusungunuka kwake.
M'mbuyomu, njira zowonongeka zowonongeka zinkagwiritsidwa ntchito kawirikawiri pofuna kuchepetsa kulemera kwa maselo a polypropylene, koma njira yowonongeka ya makina otenthetsera kwambiri imakhala ndi zovuta zambiri, monga kutayika kwa zowonjezera, kuwonongeka kwa kutentha, ndi njira zosakhazikika. Kuonjezera apo, pali njira monga kuwonongeka kwa akupanga, koma njirazi nthawi zambiri zimafuna kukhalapo kwa zosungunulira, zomwe zimawonjezera zovuta komanso mtengo wa ndondomekoyi. M'zaka zaposachedwa, njira yowonongeka kwa mankhwala ya polypropylene yakhala ikugwiritsidwa ntchito pang'onopang'ono.
Kupanga kwa high melt index PP ndi njira yowonongeka kwa mankhwala
Njira yowonongera mankhwala imaphatikizapo kuchitapo kanthu ndi polypropylene ndi zinthu zowononga mankhwala monga organic peroxides mu screw extruder, zomwe zimapangitsa kuti unyolo wa polypropylene usweke ndikuchepetsa kulemera kwawo kwa maselo. Poyerekeza ndi njira zina zowonongeka, zimakhala ndi ubwino wa kuwonongeka kwathunthu, kusungunuka kwabwino kwa kusungunuka, ndi njira yosavuta komanso yotheka yokonzekera, zomwe zimapangitsa kuti zikhale zosavuta kupanga mafakitale akuluakulu. Iyinso ndiyo njira yomwe imagwiritsidwa ntchito kwambiri ndi opanga pulasitiki osinthidwa.
Zofunikira pazida
Malo osungunuka kwambiri amatanthauza zida zomwe ndizosiyana kwambiri ndi zida wamba zosinthira PP. Zida zomwe zimagwiritsidwa ntchito popopera mankhwala osungunuka zimafuna kutalika kwa chiŵerengero ndi mutu wa makina osunthika, kapena kugwiritsa ntchito granulation pansi pa madzi (Wuxi Huachen ali ndi kudula pansi pamadzi komweko); Zinthuzo ndi zoonda kwambiri ndipo zimafunika kukhudzana ndi madzi mwamsanga mutangotuluka mumutu wa makina kuti muzizizira mosavuta;
Kupanga polypropylene ochiritsira kumafuna extruder kudula liwiro la mamita 70 pa mphindi, pamene mkulu kusungunuka mfundo polypropylene amafuna kudula liwiro la pa 120 mamita pa mphindi. Kuphatikiza apo, chifukwa cha kuthamanga kwachangu kwa polypropylene yosungunuka kwambiri, mtunda wake wozizirira uyeneranso kukulitsidwa kuchokera pa 4 metres mpaka 12 metres.
Makina opangira zida zosungunula amafunikira kusintha kosalekeza kwa mauna, nthawi zambiri pogwiritsa ntchito chosinthira mauna apawiri. Zofunikira zamagetsi zamagetsi ndizokwera kwambiri, ndipo zotchingira zambiri zimagwiritsidwa ntchito pazomangira;
1: Onetsetsani kuti mukudyetsa bwino zinthu monga PP ndi DCP;
2: Dziwani gawo loyenera la gawo ndi malo axial otsegulira potengera theka la moyo wa chilinganizo chophatikizika (chomwe chasintha mpaka m'badwo wachitatu kuti zitsimikizire kutulutsa kosalala kwa CR-PP);
3: Kuonetsetsa zokolola zambiri za zala zosungunuka mkati mwa kulolerana (zoposa 30 zotsirizidwa zimakhala ndi zotsika mtengo komanso zosakanikirana poyerekeza ndi mizere khumi ndi iwiri yokha);
4: Mitu yapadera ya nkhungu ya pansi pa madzi iyenera kukhala ndi zida. Kusungunuka ndi kutentha ziyenera kugawidwa mofanana, ndipo kuchuluka kwa zinyalala kuyenera kukhala kochepa;
5: Ndibwino kuti mukhale ndi granulator yozizira yokhwima ya zipangizo zosungunuka (zomwe zili ndi mbiri yabwino m'makampani) kuti zitsimikizire ubwino wa ma granules omalizidwa ndi kuchuluka kwa zokolola;
6: Ngati pali mayankho ozindikira pa intaneti, zingakhale bwinoko.
Kuonjezera apo, woyambitsa zowonongeka wowonjezeredwa ku chakudya cham'mbali ndi madzi amafunikira kulondola kwakukulu chifukwa cha chiwerengero chochepa chowonjezera. Kwa zida zodyetsera mbali monga Brabenda, Kubota, ndi Matsunaga opangidwa m'nyumba.
Zothandizira zowonongeka zomwe zimagwiritsidwa ntchito pano
1: Di-t-butyl peroxide, yomwe imadziwikanso kuti di tert butyl peroxide, initiator a and vulcanizing agent dTBP, ndi madzi opanda mtundu mpaka achikasu owonekera pang'ono omwe sasungunuka m'madzi ndipo amasakanikirana ndi zosungunulira organic monga benzene, toluene, ndi acetone. Oxidizing kwambiri, kuyaka, okhazikika kutentha firiji, osamva kukhudza.
2: DBPH, yofupikitsidwa ngati 2,5-dimethyl-2,5-bis (tert butylperoxy) hexane, ili ndi kulemera kwa molekyulu ya 290.44. Madzi achikasu owala, phala ngati ndi ufa woyera wamkaka, wokhala ndi kachulukidwe ka 0.8650. Kuzizira kozizira 8 ℃. Malo otentha: 50-52 ℃ (13Pa). Refractive index 1.418 ~ 1.419. Kukhuthala kwamadzimadzi ndi 6.5 mPa. s. Kung'anima (chikho chotseguka) 58 ℃. Amasungunuka mu zosungunulira zambiri monga ma alcohols, ethers, ketoni, esters, ndi ma hydrocarbon onunkhira, osasungunuka m'madzi.
3: Mayeso osungunuka chala
Kuyezetsa kwa chala chosungunuka kuyenera kuchitidwa molingana ndi GB/T 30923-2014 Polypropylene Melt Spray Zida Zapadera; Oyesa zala wamba sangayesedwe. Malo osungunuka kwambiri amatanthauza kugwiritsa ntchito njira ya voliyumu m'malo moyesa njira yoyesera.
Dongguan Liansheng Non Woven Technology Co., Ltd.idakhazikitsidwa mu Meyi 2020. Ndi bizinesi yayikulu yopanda nsalu yopanga nsalu kuphatikiza kafukufuku ndi chitukuko, kupanga, ndi malonda. Itha kupanga mitundu yosiyanasiyana ya nsalu za PP spunbond zosalukidwa ndi m'lifupi mwake osakwana 3.2 metres kuchokera ku 9 magalamu mpaka 300 magalamu.
Nthawi yotumiza: Nov-08-2024