Menene General Abubuwan Gudun Polyethylene
general Abubuwan Gudun Polyethylene
Gudun polyethylene ba mai guba bane, farin foda ko granule mara wari, farar fata a bayyanar, tare da jin kakin zuma, da ƙarancin sha ruwa, ƙasa da 0.01%. Fim ɗin polyethylene yana bayyane kuma yana raguwa tare da ƙara crystallinity. Fim ɗin polyethylene yana da ƙarancin ƙarancin ruwa amma haɓakar iska mai ƙarfi, wanda bai dace da marufi mai sabo ba amma ya dace da marufi mai ƙarfi. Yana da flammable, tare da iskar oxygen na 17.4, ƙananan hayaki lokacin konewa, ƙananan ɗigon digo, rawaya akan harshen wuta da shuɗi a ƙasa, da warin paraffin. Polyethylene yana da mafi kyawun juriya na ruwa. Fuskar samfurin ba iyakacin duniya ba ne, yana da wahalar haɗawa da bugawa, kuma an inganta shi ta hanyar jiyya. Ƙarin sarƙoƙi masu rassa suna da ƙarancin juriya ga photodegradation da oxidation.
Nauyin kwayoyinsa yana cikin kewayon 10,000 zuwa 100,000. Idan nauyin kwayoyin halitta ya wuce 100,000, nauyin polyethylene ne mai girman gaske. Mafi girman nauyin kwayoyin halitta, mafi kyawun halayensa na zahiri da na inji, kuma yana kusa da matakin da ake buƙata na kayan aikin injiniya. Amma mafi girman nauyin kwayoyin halitta, mafi wahalar aiwatarwa. Polyethylene yana da wurin narkewa na 100-130 ° C kuma yana da kyakkyawan juriya mara zafi. Har yanzu yana iya kula da kyawawan kaddarorin inji a -60 ° C, amma zafin aiki shine 80 ~ 110 ° C.
Ba shi da narkewa a cikin duk wani kaushi da aka sani a zafin jiki, kuma ana iya narkar da shi a cikin ƙaramin adadin a cikin toluene, amyl acetate, trichlorethylene da sauran kaushi sama da 70 ° C.
Abubuwan Lantarki na Gudun Polyethylene
Saboda polyethylene ba iyakacin duniya ba ne, yana da kyawawan kaddarorin lantarki tare da ƙarancin ƙarancin dielectric da ƙarfin dielectric. Ana iya amfani da shi azaman kayan rufe fuska na mitar, robo mai jure wa corona, da kuma babban kayan rufewa.
Kayan Aiki
Juriya na zafi na polyethylene ba shi da girma, kuma yana inganta tare da haɓakar nauyin kwayoyin halitta da crystallinity. Kyakkyawan juriya mai ƙarancin zafin jiki, gaɓoɓin zafin jiki na iya haɓakawarally isa kasa -50 ℃; kuma tare da haɓakar ƙwayar ƙwayar ƙwayar ƙwayar cuta, mafi ƙanƙanta zai iya kaiwa -140 ℃. Matsakaicin faɗaɗa madaidaiciyar polyethylene babba, har zuwa (20 ~ 24) × 10-5/K. High thermal watsin.