Chidziwitso chamitundu yosiyanasiyana ya nsalu za PP zosalukidwa
(1) Thupi: Nsalu yosalukidwa ya PP ndi polima yopanda poizoni, yopanda kukoma yamkaka yoyera, yomwe ndi imodzi mwamitundu yopepuka ya mapulasitiki onse pakadali pano.Ndiwokhazikika makamaka pamadzi, ndipo kuchuluka kwa madzi m'madzi ndi 0.01% pambuyo pa 14h.Kulemera kwa maselo ndi pafupifupi 80,000 ~ 150,000, ndi mawonekedwe abwino.Komabe, chifukwa cha shrinkage yayikulu, zida zoyambirira zapakhoma zimakhala zosavuta kugwa, ndipo pamwamba pa zinthuzo ndi zonyezimira komanso zosavuta kuzikongoletsa.
(2) Makina amakina: Nsalu yosalukidwa ya PP imakhala ndi crystallinity yayikulu komanso mawonekedwe okhazikika, chifukwa chake imakhala ndi makina abwino kwambiri.Mphamvu zake, kuuma kwake ndi kukhazikika kwake ndizokwera kuposa za PE (HDPE) yapamwamba kwambiri.Chodziwika bwino ndikupindika kukana kutopa (7 × 10 ^ 7) Kutsegula kwachiwiri ndi kutseka kumapindika popanda kuwonongeka, ndipo chowotcha chowuma chimakhala chofanana ndi nayiloni, koma ndi chocheperako kuposa nayiloni pansi pa mafuta opaka mafuta.
(3) matenthedwe ntchito: PP sanali nsalu nsalu ali wabwino kutentha kukana, malo osungunuka ndi 164 ~ 170 ℃, ndi mankhwala akhoza chosawilitsidwa pa kutentha pamwamba 100 ℃.Popanda mphamvu yakunja, sichidzawonongeka pa 150 ℃.Kutentha kwa embrittlement ndi - 35 ℃, zomwe zidzachitika pansi - 35 ℃, ndipo kukana kutentha sikuli bwino monga PE.
(4) Kukhazikika kwa Chemical: Nsalu yopanda nsalu ya PP imakhala ndi kukhazikika kwamankhwala abwino.Kuphatikiza pakukokoloka ndi asidi, imakhala yokhazikika kuzinthu zina zamankhwala.Komabe, otsika molecular kulemera aliphatic hydrocarbons, onunkhira ma hydrocarbons, etc. akhoza kufewetsa ndi kutupa PP sanali nsalu nsalu, ndipo kukhazikika kwa mankhwala kumakhalanso bwino ndi kuwonjezeka kwa crystallinity.Choncho, PP sanali nsalu nsalu ndi oyenera kupanga Russian ndi Chinese mankhwala mapaipi ndi zipangizo, ndi zotsatira zabwino odana ndi dzimbiri.
(5) Kuchita kwamagetsi: Kuthamanga kwafupipafupi kwa nsalu zosalukidwa ndikwabwino kwambiri.Chifukwa pafupifupi sichimamwa madzi, ntchito yotsekemera simakhudzidwa ndi chinyezi.Ili ndi dielectric coefficient yayikulu.Ndi kuwonjezeka kwa kutentha, chitha kugwiritsidwa ntchito kupanga zida zotenthetsera zamagetsi.Vuto lakuwonongeka ndilokwera kwambiri, ndipo ndiloyenera zipangizo zamagetsi.Kukana kwamagetsi abwino komanso kukana kwa arc, koma magetsi okhazikika, osavuta kukalamba mukalumikizana ndi mkuwa.
(6) Kukana kwanyengo: Nsalu zosalukidwa zimakhudzidwa kwambiri ndi kuwala kwa ultraviolet, ndipo kukana kukalamba kumatha kuwongolera powonjezera zinc oxide thiopropionic acid lauryl ester, kaboni wakuda ngati mikwingwirima yoyera yamkaka, etc.
Ndi Jacky Chen
Nthawi yotumiza: Dec-06-2022
