Mapaipi ndi zomangira za PP-R zimatengera polypropylene mwachisawawa ngati zida zazikulu ndipo amapangidwa molingana ndi GB / T18742. Polypropylene akhoza kugawidwa mu PP-H (homopolymer polypropylene), PP-B (block copolymer polypropylene), ndi PP-R (random copolymer polypropylene). Pawiri khoma malata chitoliro makina amagwira ntchito yofunika kupanga chitoliro. PP-R ndiye chinthu chosankha mapaipi a polypropylene amadzi otentha ndi ozizira chifukwa cha kukana kwake kwanthawi yayitali kupsinjika kwa hydrostatic, kukalamba kosagwira kwa oxygen kwa nthawi yayitali komanso kukonza ndi kuumba.
Kodi chubu cha PP-R ndi chiyani?
Chitoliro cha PP-R chimatchedwanso chitoliro chamitundu itatu cha polypropylene. Imatengera mwachisawawa copolymer polypropylene kuti extruded mu chitoliro, ndi jekeseni-kuumbidwa mu chitoliro. Ndi mtundu watsopano wa mankhwala a pulasitiki opangidwa ndikugwiritsidwa ntchito ku Ulaya kumayambiriro kwa zaka za m'ma 1990. PP-R anaonekera chakumapeto 80′s, ntchito mpweya gawo copolymerization ndondomeko kupanga pafupifupi 5% Pe mu PP maselo unyolo chisawawa ndi uniformly polymerized (chisawawa copolymerization) kukhala mbadwo watsopano wa zipangizo payipi. Imakhala ndi kukana kwamphamvu komanso kugwira ntchito kwanthawi yayitali.
Kodi mapaipi a PP-R ndi ati? Chitoliro cha PP-R chili ndi izi:
1.zopanda poizoni komanso zaukhondo. Mamolekyu a PP-R ndi carbon ndi hydrogen okha. Palibe zinthu zovulaza komanso zapoizoni. Ndi aukhondo komanso odalirika. Sagwiritsidwa ntchito m'mapaipi amadzi otentha ndi ozizira, komanso amagwiritsidwa ntchito m'madzi akumwa akumwa.
2.Kuteteza kutentha ndi kupulumutsa mphamvu. Kutentha kwa chitoliro cha PP-R ndi 0.21w / mk, yomwe ndi 1/200 yokha ya chitoliro chachitsulo.
3.kukana kutentha kwabwino. Vicat softening point ya PP-R chubu ndi 131.5 ° C. Kutentha kwakukulu kogwira ntchito kumatha kufika 95 ° C, komwe kungathe kukwaniritsa zofunikira za machitidwe a madzi otentha pomanga mafotokozedwe a madzi ndi ngalande.
4.Utumiki wautali wautali. The moyo ntchito chitoliro PP-R angafikire zaka zoposa 50 pansi pa kutentha ntchito 70 ℃ ndi kuthamanga ntchito (PN) 1.OMpa; moyo utumiki wa kutentha yachibadwa (20 ℃) akhoza kufika zaka zoposa 100.
5.Easy unsembe ndi kugwirizana odalirika. PP-R ili ndi ntchito yabwino yowotcherera. Mapaipi ndi zopangira zimatha kulumikizidwa ndi kusungunula kotentha ndi kuwotcherera kwamagetsi, zomwe zimakhala zosavuta kuziyika komanso zodalirika pazolumikizana. Mphamvu za ziwalo zogwirizanitsidwa ndi zazikulu kuposa mphamvu ya chitoliro chokha.
6.Zinthu zitha kubwezeretsedwanso. Zinyalala za PP-R zimatsukidwa ndikuphwanyidwa ndikusinthidwanso kuti zipangidwe zitoliro ndi mapaipi. Kuchuluka kwa zinthu zobwezerezedwanso sikudutsa 10% ya ndalama zonse, zomwe sizimakhudza khalidwe la mankhwala.
Kodi gawo lalikulu la mapaipi a PP-R ndi chiyani?
1.Makina ozizira ndi otentha a nyumbayi, kuphatikiza makina otenthetsera apakati;
2.Dongosolo lotenthetsera mnyumbamo, kuphatikiza pansi, m'mbali mwake ndi njira yoyaka moto;
3.Pure madzi dongosolo kumwa mwachindunji;
4.Central (centralized) air-conditioning system;
5.Industrial mapaipi machitidwe onyamula kapena kutulutsa media media.
Nthawi yotumiza: May-19-2021