Mutsetse wekuwedzera wepaipi yekudzivirira kupisa yeHDPE
Chiratidzo Chepamusoro Chehunyanzvi
Mashandiro uye maficha
Mutsetse wekugadzira pombi yekudzivirira wakagadzirwa ne PE insulation pombi mold yakakosha, kumanikidzwa kwe extrusion kwakasimba, uye ukobvu hwepombi ine madziro matete hwakafanana. Kumhanya kwe extrusion kunokurumidza, kubuda kwemhando ye blowing kunovandudzwa zvikuru, pamusoro pakajeka, uye otomatiki yekushanda yakakwira.
Pombi yeHDPE ipombi yepurasitiki inochinjika yakagadzirwa nepolyethylene ine thermoplastic yakawanda inoshandiswa zvakanyanya kutakura mvura inonwiwa, marara ane njodzi, magasi akasiyana-siyana, matope, mvura yemoto, mvura yemvura, nezvimwewo. Kubatana kwakasimba kwemamorekuru epombi yeHDPE kunobatsira kuti ishandise pamapaipi ane simba guru. Mapaipi epolyethylene ane nhoroondo refu uye inozivikanwa yebasa remagasi, mafuta, migodhi, mvura, nemamwe maindasitiri. Nekuda kwehuremu hwayo hushoma uye kuramba ngura kwakanyanya, indasitiri yemapaipi eHDPE iri kukura zvikuru. Mugore ra1953, Karl Ziegler naErhard Holzkamp vakawana polyethene ine simba guru (HDPE). Mapaipi eHDPE anogona kushanda zvinogutsa munzvimbo dzakasiyana-siyana dzekupisa kubva -2200 F kusvika +1800 F. Zvisinei, kushandiswa kweMapaipi eHDPE hakukurudzirwi kana tembiricha yemvura ichipfuura 1220 F (500 C).
Mapaipi eHDPE anogadzirwa ne polymerization ye ethylene, chinhu chinobva mumafuta. Zvimwe zvinhu zvinowedzerwa (zvinosimbisa, zvinozadza, zvinopfavisa, zvinonyorovesa, mafuta anozora, zvinodzora marara, zvinobvisa moto, zvinoputira, zvinosanganisa, zvinoderedza marara e ultraviolet, nezvimwewo) zvinowedzerwa kuti pave nepaipi yekupedzisira yeHDPE nezvikamu zvayo. Kureba kwepaipi yeHDPE kunogadzirwa nekupisa resin yeHDPE. Inobva yaburitswa kuburikidza ne die, iyo inosarudza dhayamita yepaipi. Ukobvu hwemadziro epaipi hunotsanangurwa nekubatanidzwa kwehukuru hwe die, kumhanya kwe screw, uye kumhanya kwe tarakita inobviswa. Kazhinji, 3-5% kabhoni nhema inowedzerwa kuHDPE kuti irambe UV, izvo zvinoshandura mapaipi eHDPE kuita matema muruvara. Mamwe mavara akasiyana anowanikwa asi haawanzo shandiswa. Paipi yeHDPE ine mavara kana mitsetse inowanzova 90-95% dema, uko mutsetse une mavara unowanikwa pa5% yekunze.