Kodi pali kusiyana kotani pakati pa PVC ndi EVA?

Ndi kupita patsogolo kwapang'onopang'ono kwa nthawi, miyoyo ya anthu yasintha kwambiri, ndipo kugwiritsa ntchito zipangizo zatsopano zosiyanasiyana kwafala kwambiri. Mwachitsanzo, PVC ndiEVAzipangizo zimagwiritsidwa ntchito kwambiri m'moyo wamasiku ano, koma anthu ambiri amasokoneza mosavuta. . Kenaka, tiyeni timvetsetse kusiyana pakati pa PVC ndi EVA zipangizo.

1. Maonekedwe ndi mawonekedwe osiyanasiyana:
PVC ku China kumtunda akhoza kugawidwa m'magulu awiri: otsika poizoni ndi ochezeka chilengedwe ndi sanali poizoni ndi wochezeka chilengedwe. Zida za EVA zonse ndi zida zoteteza chilengedwe. Pamwamba pa Eva ndi ofewa; kulimba kwake kumakhala kolimba kuposa kwa PVC, ndipo kumamveka kumata (koma palibe guluu pamwamba); ndi yoyera komanso yowonekera, komanso yowonekera Kwambiri, kumverera ndi kumverera ndizofanana kwambiri ndi filimu ya PVC, choncho tcheru chiyenera kuperekedwa kuti chiwasiyanitse.

2. Njira zosiyanasiyana:
PVC ndi thermoplastic resin polymerized ndi vinyl chloride pansi pa zochita za woyambitsa. Ndi homopolymer wa vinyl chloride. Vinyl chloride homopolymer ndi vinyl chloride copolymer onse pamodzi amatchedwa vinyl chloride resin. PVC inali pulasitiki yopangidwa kwambiri padziko lonse lapansi ndipo idagwiritsidwa ntchito kwambiri. Maselo a EVA (ethylene vinyl acetate copolymer) ndi C6H10O2 ndipo kulemera kwake kwa maselo ndi 114.1424. Izi zimagwiritsidwa ntchito ngati mafilimu osiyanasiyana, zinthu za thovu, zomatira zotentha zosungunuka ndi ma polima osintha.

3. Kufewa kosiyana ndi kuuma: Mtundu wachilengedwe wa PVC ndi wachikasu pang'ono, wowoneka bwino komanso wonyezimira. Kuwonekera bwino kuposa polyethylene ndi polystyrene, koma koyipa kuposa polystyrene. Kutengera kuchuluka kwa zowonjezera, zimagawidwa kukhala zofewa komanso zolimba za polyvinyl chloride. Zofewa zimakhala zosinthika komanso zolimba komanso zomata, pomwe zolimba zimakhala zolimba kwambiri kuposa polyethylene yocheperako. , ndipo m'munsi kuposa polypropylene, kuyera kudzachitika pa inflection point. EVA (ethylene vinyl acetate copolymer) ndi yofewa kuposa PVC.

4. Mitengo ndi yosiyana:
Zida za PVC: Mtengo pa tani uli pakati pa 6,000 ndi 7,000 yuan. Zida za EVA zimakhala ndi makulidwe osiyanasiyana ndi mitengo. Mtengo wake ndi pafupifupi 2,000 / kiyubiki mita.

5. Makhalidwe osiyanasiyana:
PVC ili ndi zida zabwino zotchinjiriza zamagetsi, zitha kugwiritsidwa ntchito ngati zida zotsika pafupipafupi, komanso kukhazikika kwake kwamankhwala ndikwabwino. Chifukwa cha kusakhazikika kwa kutentha kwa polyvinyl chloride, kutentha kwa nthawi yayitali kumayambitsa kuwola, kutulutsa mpweya wa HCl, ndi kusinthika kwa polyvinyl chloride. Chifukwa chake, mawonekedwe ake ndi opapatiza, ndipo kutentha kwa ntchito nthawi zambiri kumakhala pakati pa -15 ndi 55 madigiri. EVA ndi yolimba kutentha. Ukatenthedwa, umasungunuka kumlingo wakutiwakuti ndipo umakhala madzi omwe amatha kuyenda komanso kukhala ndi mamasukidwe enaake.