1. Kodi pepala lolimba la PVC ndi chiyani?
Dzina lonse la pepala lolimba la PVC ndi pepala lolimba la polyvinyl chloride. Pepala lolimba la PVC ndi chinthu cha polymer chopangidwa ndi vinyl chloride ngati zinthu zopangira, chokhala ndi zolimbitsa thupi, mafuta odzola ndi zodzaza. Lili ndi antioxidant yapamwamba kwambiri, asidi wamphamvu komanso kukana kuchepetsa, mphamvu yayikulu, kukhazikika bwino komanso kusayaka, ndipo limatha kupirira dzimbiri chifukwa cha kusintha kwa nyengo. Mapepala okhazikika a PVC ndi monga mapepala owonekera a PVC, mapepala oyera a PVC, mapepala akuda a PVC, mapepala amitundu yosiyanasiyana a PVC, mapepala a imvi a PVC, ndi zina zotero.
2. Kodi ubwino wa pepala lolimba la PVC ndi wotani?
Mapepala olimba a PVC ali ndi zabwino zambiri monga kukana dzimbiri, kusayaka, kutchinjiriza, komanso kukana okosijeni. Kuphatikiza apo, amatha kukonzedwanso ndipo amakhala ndi ndalama zochepa zopangira. Chifukwa cha mitundu yosiyanasiyana ya magwiritsidwe ntchito awo komanso mitengo yotsika mtengo, nthawi zonse akhala gawo la msika wa mapepala apulasitiki. Pakadali pano, ukadaulo wamakono komanso kapangidwe ka mapepala a PVC mdziko lathu wafika pamlingo wapamwamba padziko lonse lapansi.
3. Kodi pepala la PVC limagwiritsidwa ntchito bwanji?
Mapepala a PVC ndi osinthasintha kwambiri, ndipo pali mitundu yosiyanasiyana ya mapepala a PVC, monga mapepala owonekera bwino a PVC, mapepala a PVC oundana, mapepala obiriwira a PVC, mapepala a PVC, ndi zina zotero. Chifukwa cha magwiridwe antchito ake abwino, mtengo wotsika wopanga, kukana dzimbiri komanso kutchinjiriza. Mapepala a PVC amagwiritsidwa ntchito kwambiri ndipo amagwiritsidwa ntchito kwambiri popanga: zophimba zomangira za PVC, makadi a PVC, mafilimu olimba a PVC, mapepala olimba a PVC, ndi zina zotero.
4. Kodi vuto la pepala la PVC ndi lotani?
Mapepala a PVC ndi pulasitiki yomwe imagwiritsidwanso ntchito kwambiri. Ndi utomoni wopangidwa ndi polyvinyl chloride resin, plasticizer, ndi antioxidant. Siwowopsa paokha. Koma zinthu zothandiza monga mapulasitiki ndi ma antioxidants ndi oopsa. Mapulasitiki omwe amagwiritsidwa ntchito tsiku ndi tsiku mu mapepala a PVC amagwiritsa ntchito dibutyl terephthalate ndi dioctyl phthalate. Mankhwalawa ndi oopsa. Antioxidant lead stearate yomwe imagwiritsidwa ntchito mu PVC nayonso ndi yowopsa. Mapepala a PVC okhala ndi mchere wa lead antioxidants amawononga lead akakumana ndi zosungunulira monga ethanol ndi ether. Mapepala a PVC okhala ndi lead amagwiritsidwa ntchito popaka chakudya. Akakumana ndi ndodo zokazinga, makeke okazinga, nsomba yokazinga, nyama yophikidwa, makeke ndi zokhwasula-khwasula, ndi zina zotero, mamolekyu a lead amafalikira mu mafuta. Chifukwa chake, matumba apulasitiki a PVC sheet sangagwiritsidwe ntchito kusungira chakudya, makamaka chakudya chokhala ndi mafuta. Kuphatikiza apo, zinthu za pulasitiki za polyvinyl chloride zimawononga pang'onopang'ono mpweya wa hydrogen chloride kutentha kwambiri, monga pafupifupi 50°C, zomwe zimavulaza thupi la munthu.
