Pamene ogwiritsa ntchito ambiri amasankhaPE mapaipi, nthawi zambiri zimakhala zosavuta kulakwitsa chifukwa chosamvetsetsa bwino.Sakudziwa ngati agwiritse ntchito mapaipi a polypropylene mwachisawawa kapena mapaipi a polyethylene pantchito zoperekera madzi pomanga.Kodi pali kusiyana kotani pakati pawo?Nsalu yaubweya?Ndiroleni ndikudziwitseni.
Mfundo zazikuluzikulu ndi izi:
M'madzi akumwa, PE imagwiritsidwa ntchito ngati chitoliro chamadzi ozizira;PPR (zinthu zapadera zamadzi otentha) zitha kugwiritsidwa ntchito ngati chitoliro chamadzi otentha;palinso PPR (zinthu zamadzi ozizira) zomwe zimagwiritsidwa ntchito ngatichitoliro cha madzi ozizira;Ngati ndi chitoliro cha madzi otentha, ndithudi PPR ndi bwino;(ngati ndi chitoliro chamadzi akumwa chokongoletsera kunyumba, ndiye kuti palibe chifukwa chosiyanitsira, makamaka PPR imagwiritsidwa ntchito kuposa PE) Ngati mukuchita mapaipi amadzi ozizira, mutha kuloza izi:
1. Kuyerekeza kukana kutentha pakati pa PPR madzi chitoliro ndiPE madzi chitoliro.
Pogwiritsa ntchito bwino, chitoliro chamadzi cha PE chimakhala ndi kutentha kokhazikika kwa 70 ° C ndi kutentha kwa -30 ° C.Izi zikutanthauza kuti, mu kutentha kotereku, kugwiritsa ntchito mapaipi amadzi a PE kwa nthawi yaitali ndi otetezeka komanso odalirika.
Pogwiritsa ntchito bwino, chitoliro chamadzi cha PPR chimakhala ndi kutentha kokhazikika kwa 70 ° C ndi kutentha kwa -10 ° C.Zimasonyezanso kuti mumtundu wa kutentha uku, kugwiritsa ntchito mapaipi amadzi a PPR kwa nthawi yaitali ndi otetezeka komanso odalirika.Zimaganiziridwa kuti mapaipi amadzi a PE ali ndi kutentha kwakukulu kofanana ndi mapaipi amadzi a PPR.Komabe, mapaipi amadzi a PE ndi abwino kuposa mapaipi amadzi a PPR potengera kutentha kochepa.
2.kusiyana pakati pa mapaipi amadzi a PE ndi mapaipi amadzi a PPR pankhani ya ukhondo
Chigawo chachikulu cha maselo a PE madzi chitoliro ndi polyethylene.Owerenga omwe aphunzira za organic chemistry amadziwa kuti kapangidwe ka mankhwalawa ndi ma atomu awiri a kaboni ophatikizidwa ndi maatomu asanu a haidrojeni, imodzi mwazomwe imaphatikizidwa ndi atomu ya kaboni ndi mgwirizano wapawiri, kenako ethylene The molekyu imodzi ya polima imapangidwa polima mwanjira inayake, ndipo chinthu choterocho ndi polyethylene.Ndiye chitoliro chamadzi cha PPR ndi chiyani?Chigawo chachikulu cha PPR madzi chitoliro ndi propylene, ndiko kuti, maatomu atatu mpweya amaphatikizidwa ndi maatomu asanu haidrojeni, ndi atomu wa haidrojeni limodzi ndi atomu mpweya ndi chomangira iwiri, ndiyeno mankhwala anapanga pambuyo polymerization ndi polypropylene mankhwala.Zogulitsa zoterezi zimakhala zofanana ndi zaukhondo ndi chitetezo.Chofunikira ndichakuti ngati zida zopangira bizinesi zimakwaniritsa zofunikira, osati kusiyana pakati pa zinthu ziwirizi.Ndizopanda pake kulengeza kuti mapaipi amadzi a PE ndi aukhondo kuposa mapaipi amadzi a PPR m'manyuzipepala.Mapaipi onse oyenerera amadzi a PE ndi zinthu zapaipi zamadzi za PPR ziyenera kuyezeredwa zaukhondo (kupatula zinthu zabodza ndi zopanda pake).Ndichinyengonso kwa ogula kunena kuti mapaipi amadzi a PE ndi aukhondo komanso otetezeka kuposa mapaipi amadzi a PPR.
3. Elastic modulus
The zotanuka modulus wa PPR madzi chitoliro ndi 850MPa.Chitoliro chamadzi cha PE ndi cha polyethylene yapakatikati, ndipo modulus yake yotanuka ndi pafupifupi 550MPa.Ili ndi kusinthasintha kwabwino komanso kusasunthika kosakwanira.Amagwiritsidwa ntchito m'munda womanga madzi.Osati wokongola.
Kutentha kwamafuta: Chitoliro chamadzi cha PPR ndi 0.24, chitoliro chamadzi cha PE ndi 0.42, chomwe chimakhala chokwera kawiri.Ngati imagwiritsidwa ntchito potenthetsa pansi, iyi ndi mfundo yake yolimba.Kutentha kwabwino kumatanthawuza kuti kutentha kwa kutentha kumakhala bwino, koma kumagwiritsidwa ntchito m'mapaipi amadzi otentha.Choyipa ndi chakuti ngati kutentha kwa kutentha kuli bwino, kutentha kwa kutentha kudzakhala kwakukulu, ndipo kutentha kwa chitoliro kudzakhala kwakukulu, komwe kumakhala kosavuta kuwotcha.
4. Kuwotcherera ntchito
Ngakhale mapaipi amadzi a PPR ndi mapaipi amadzi a PE amatha kusungunula kutentha, mapaipi amadzi a PPR ndi osavuta kugwiritsa ntchito, ndipo kuphulika kwa mapaipi amadzi a PPR kumakhala kozungulira, pomwe kuphulika kwa mapaipi amadzi a PE kumakhala kosakhazikika komanso kosavuta kutsekereza;kutentha kwa kuwotcherera kumakhalanso kosiyana, mapaipi amadzi a PPR ndi 260 ° C, mapaipi amadzi a PE Kutentha ndi 230 ° C, ndipo makina otsekemera apadera a mapaipi amadzi a PPR pamsika ndi osavuta kuwotcherera ndikuyambitsa madzi.Komanso, chifukwa PE madzi chitoliro zakuthupi n'zosavuta oxidize, zida zapadera ayenera kugwiritsidwa ntchito kukanda pakhungu okusayidi pamwamba pamaso kuwotcherera, apo ayi ndithu Integrated chitoliro sangathe kupangidwa, ndipo chitoliro sachedwa kutayikira madzi, kotero. kumangako kumakhala kovuta kwambiri.
5. Mphamvu yotsika ya kutentha:
Mfundo imeneyi ndi mphamvu PE madzi chitoliro zakuthupi mawu a zizindikiro.Mapaipi amadzi a PPR ndi amphamvu kuposa mapaipi amadzi a PE, ndipo mapaipi amadzi a PE ndi osinthika kuposa mapaipi amadzi a PPR.Izi zimatsimikiziridwa ndi momwe zinthu zilili, koma ndizopanda tanthauzo kukokomeza kuzizira kwamadzi a PPR mapaipi., mapaipi amadzi a PPR akhala akugwiritsidwa ntchito ku China kwa zaka zoposa khumi.Opanga achepetsa pang'onopang'ono zoopsa zobisika zomwe zimadza chifukwa cha kusagwira bwino ntchito mwa kulongedza bwino ndikuwonjezera kulengeza.Kusamalira mwankhanza ndi kumanga kudzachititsanso mapaipi amadzi a PE pamtunda.Zikanda ndi kupsinjika ming'alu;Akagwiritsidwa ntchito m'malo otentha kwambiri, payipi iliyonse iyenera kukhala yotsekedwa, apo ayi kukula kwa voliyumu komwe kumachitika chifukwa cha kuzizira kumapangitsa kuti payipi iwume ndi kusweka.Chitoliro cha PPR ndi chitoliro choyenera cha mapaipi amadzi akumwa, ndipo malo akunja sali abwino ngati m'nyumba.Mapaipi a PE amagwiritsidwa ntchito, omwenso ndi abwino kwa mapaipi akulu amadzi.
6. Kukula kwa chitoliro
Kukula kwakukulu komwe kungapangidwe ndi chitoliro cha PE ndi dn1000, ndipo mawonekedwe a PPR ndi dn160.Chifukwa chake, mapaipi a PE amagwiritsidwa ntchito kwambiri ngati mapaipi a ngalande, ndipo mapaipi operekera madzi nthawi zambiri amakhala PPR.
Nthawi yotumiza: Jun-30-2023
