PE mapaipitsopano ali pamsika, ndipo ali kale mankhwala odziwika bwino, makamaka omwe ali m'makampani.Mapaipi a PE akatchulidwa, nthawi yomweyo amaganiza za kukana kuvala, kukana kupanikizika, kukana dzimbiri komanso moyo wautali wautumiki.Pali mapaipi ambiri a PE.Mitundu, zopangira PE zimagawidwanso m'mitundu yambiri, zopangidwa ndi chitoliro cha PE zimagawidwanso m'mitundu yambiri, mafotokozedwe atsatanetsatane amasiku ano, pali kusiyana kotani pakati pa miyeso ya chitoliro cha PE80 ndi chitoliro cha PE100?
Zinthu za PE ndi polyethylene, zomwe ndi zida zapulasitiki zosiyanasiyana.Ndi chinthu cha polima chopangidwa kuchokera ku polyethylene.
Kwenikweni anawagawa m'magulu awiri: otsika osalimba polyethylene LDPE (otsika mphamvu);high kachulukidwe polyethylene HDPE.Zida za PE zimagawidwa m'magulu asanu malinga ndi muyezo wapadziko lonse lapansi: kalasi ya PE32, kalasi ya PE40, kalasi ya PE63, kalasi ya PE80 ndi kalasi ya PE100.
Kupanga mapaipi PE kwa madzi mipope ndi mkulu-kachulukidwe polyethylene (HDPE), ndi magiredi ake ndi PE80 ndi PE100 (malinga ndi chidule cha Osachepera Chofunika Mphamvu, MRS).MRS wa PE80 amafika 8MPa;MRS ya PE100 imafika ku 10MPa.MRS amatanthauza kulimba kwamphamvu kwa chitoliro (mtengo wowerengeka woyesedwa molingana ndi miyezo yapadziko lonse lapansi).
PE80 (8.00 ~ 9.99Mpa) ndi masterbatch ndi antimoni trioxide zili 80% pa polyethylene gawo lapansi, amene angagwiritsidwe ntchito makamaka poponya ndi filimu kupanga nthawi yomweyo.Ndi granular yopanda fumbi lopanda fumbi la masterbatch lomwe ndi lotetezeka popanga kuposa ufa wamba, losavuta kudziwa mlingo, komanso limatengedwa ngati masterbatch-cholinga chonse, yomwe imakhala yomasuka mu mawonekedwe a granular.
PE100 (10.00～11.19Mpa) ndi chiwerengero cha magiredi akapeza ndi rounding osachepera chofunika mphamvu (MRS) wa polyethylene yaiwisi.Malinga ndi GB/T18252, mphamvu ya hydrostatic ya zinthu zomwe zimagwirizana ndi 20 ℃, zaka 50 komanso kuthekera konenedweratu kwa 97.5% kumatsimikiziridwa malinga ndi GB/T18252.σLPL, tembenuzani MRS, ndikuchulukitsa MRS ndi 10 kuti mupeze nambala yamagulu azinthuzo.
Ngati mapaipi ndi zopangira zopangidwa kuchokera kumagulu osiyanasiyana azinthu za polyethylene ziyenera kulumikizidwa, zolumikizirazo ziyenera kuyesedwa ndi hydraulic.Kawirikawiri, PE63, PE80, PE100 zosakaniza ndi kusungunuka kwachangu (MFR) (190 ° C / 5kg) pakati pa 0.2g / 10min ndi 1.3g / 10min ziyenera kuganiziridwa kuti zimagwirizanitsidwa ndipo zikhoza kulumikizidwa wina ndi mzake.Zida zopangira kunja kwamtunduwu ziyenera kuyesedwa kuti zidziwe.
1. Kodi PE100 polyethylene chitoliro ndi chiyani?
Kukula kwa zida za chitoliro cha polyethylene kumadziwika kuti kugawidwa m'mibadwo itatu, yomwe ndi magawo atatu akukula:
M'badwo woyamba, polyethylene yotsika kwambiri komanso "mtundu woyamba" wa polyethylene wosalimba kwambiri, sagwira bwino ntchito ndipo ndi ofanana ndi zida zamakono za polyethylene zomwe zili pansipa PE63.
M'badwo wachiwiri, womwe unawonekera m'zaka za m'ma 1960, ndi chitoliro cha polyethylene chapakati-kachulukidwe chokhala ndi mphamvu ya nthawi yayitali ya hydrostatic ndi kukana kwa ming'alu, yomwe tsopano imatchedwa PE80 kalasi ya polyethylene chitoliro.
M'badwo wachitatu, amene anaonekera mu 1980s, amatchedwa m'badwo wachitatu polyethylene chitoliro chapadera PE100.PE100 zikutanthauza kuti pa 20 ° C, chitoliro polyethylene akhoza kukhalabe osachepera chofunika mphamvu MRS wa 10MPa pambuyo zaka 50, ndipo ali kukana kwambiri kukula mofulumira mng'alu.
2. Kodi ubwino waukulu wa PE100 polyethylene chitoliro ndi chiyani?
PE100 ili ndi zabwino zonse za polyethylene, ndipo makina ake amapangidwa bwino kwambiri, zomwe zimapangitsa PE100 kukhala ndi zabwino zambiri zapadera ndipo imagwiritsidwa ntchito m'minda yambiri.
2.1 Kukana kwamphamvu kwambiri
Chifukwa utomoni wa PE100 uli ndi mphamvu yochepa yofunikira ya 10MPa, ndi yamphamvu kwambiri kuposa ma polyethylenes ena, ndipo mpweya ndi madzi zimatha kunyamulidwa pansi pa kuthamanga kwambiri;
2.2 Khoma laling'ono
Pansi pa kuthamanga kwa ntchito, khoma la chitoliro lopangidwa ndi zinthu za PE100 limatha kuchepetsedwa kwambiri.Kwa mapaipi amadzi akuluakulu, kugwiritsa ntchito mipope yopyapyala kumatha kupulumutsa zida ndikukulitsa malo ozungulira mapaipi, motero kukulitsa mphamvu zoyendetsera mapaipi.Ngati mphamvu yotumizira imakhala yosasinthasintha, kuwonjezeka kwa gawolo kumabweretsa kuchepa kwa kayendedwe ka kayendedwe kake, kotero kuti kutumiza kungathe kuzindikiridwa ndi pampu yaing'ono yamagetsi, koma mtengo wake umapulumutsidwa.
2.3 Chitetezo chapamwamba
Ngati chitoliro ndi kukula kapena kuthamanga kwa ntchito kwafotokozedwa, chitetezo chomwe PE100 ingatsimikizire ndikutsimikizika pamapaipi amakono a polyethylene.
2.4 Kuuma kwakukulu
Zinthu za PE100 zili ndi zotanuka modulus ya 1250MPa, yomwe ndi yokwera kuposa 950MPa ya utomoni wamba wa HDPE, zomwe zimapangitsa chitoliro cha PE100 kukhala ndi kuuma kwa mphete.
3. Zimango katundu PE100 utomoni
3.1 Mphamvu Zosatha
Kupirira kwamphamvu kunatsimikiziridwa ndi kukakamiza kuyesa mizere pa kutentha kosiyana (20 ° C, 40 ° C, 60 ° C ndi 80 ° C).Pa 20 ℃, PE100 utomoni akhoza kukhalabe mphamvu 10MPa pambuyo zaka 50, (PE80 ndi 8.0MPa).
3.2 Kulimbana bwino ndi kupsinjika kwa crack
PE100 polyethylene chitoliro chapadera ali ndi kukana wabwino kupsinjika akulimbana, kuchedwetsa kuchitika kwa nkhawa akulimbana (> 10000 maola), ndipo akhoza kuchedwa kwa zaka zoposa 100 pansi pa chikhalidwe cha 20 ℃.
3.3 Kukana kwakukulu kukukula msanga kwa mng'alu
Chofunikira pakutha kukana kukula kofulumira kwa ming'alu chimachepetsa kugwiritsa ntchito mapaipi amtundu wa polyethylene: kwa gasi, malire apakati ndi 0.4MPa, komanso popereka madzi ndi 1.0MPa.Chifukwa cha mphamvu yodabwitsa ya PE100 yolimbana ndi kukula kwachangu kwa ming'alu, malire a mpweya wa gasi amawonjezeka kufika ku 1.0MPa (1.2MPa yakhala ikugwiritsidwa ntchito ku Russia ndi 1.6MPa mumtsinje wotumizira madzi).Mwachidule, kugwiritsa ntchito PE100 polyethylene zakuthupi m'mapaipi kudzatsimikizira kuti magawo ogwiritsira ntchito mapaipi amadzi a pe100 mumaneti a chitoliro ndi otetezeka, okwera mtengo komanso amakhala ndi moyo wautali wautumiki.
Nkhani: http://www.chinapipe.net/baike/knowledge/15022.html
Nthawi yotumiza: Nov-04-2022
