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Chifukwa chiyani mitundu yofananira ndi pulasitiki imazimiririka?

Enlarged font  Narrow font Release date:2021-04-03  Source:Yaying'ono jekeseni  Browse number:239
Note: Kutha kwa zinthu zamapulasitiki achikuda kumakhudzana ndi kukana kwamphamvu, kukana kwa oxygen, kutentha kwa kutentha, asidi ndi kukana kwa alkali kwa toner, ndi mawonekedwe a utomoni womwe wagwiritsidwa ntchito.

Zida zamapulasitiki zimatha chifukwa cha zinthu zambiri. Kutha kwa zinthu zamapulasitiki achikuda kumakhudzana ndi kukana kwamphamvu, kukana kwa oxygen, kutentha kwa kutentha, asidi ndi kukana kwa alkali kwa toner, ndi mawonekedwe a utomoni womwe wagwiritsidwa ntchito.

Otsatirawa ndi kusanthula mwatsatanetsatane kwa zinthu zomwe zimafota pakhungu la pulasitiki:

1. Kukhazikika kwa utoto

Kufulumira kwa mtundu wa colorant kumakhudza mwachindunji kuzimiririka kwa malonda. Pazogulitsa zakunja zomwe zimawunikiridwa ndi kuwala kwamphamvu, kufunika kwachangu (kufulumira kwa kuwala) kofunikira kwa colorant yomwe ikugwiritsidwa ntchito ndichizindikiro chofunikira. Mulingo wofulumira kwambiri ndi wosauka, ndipo malondawo amatha kuzimiririka mukamagwiritsa ntchito. Magulu oyeserera mopepuka omwe asankhidwa pazinthu zosagwira nyengo sayenera kukhala ochepera pasukulu sikisi, makamaka magiredi asanu ndi awiri kapena asanu ndi atatu, ndipo zogulitsa zamkati zimatha kusankha masukulu anayi kapena asanu.

Kulimbana kwa kuwala kwa chonyamulira kumathandizanso pakusintha mitundu, ndipo mawonekedwe amtundu wa utomoni amasintha ndikuzimiririka atawunikiridwa ndi cheza cha ultraviolet. Kuphatikiza zowongolera zopepuka monga ma ultraviolet oyamwa ku masterbatch kumatha kupititsa patsogolo kuyatsa kwamitundu ndi zinthu zapulasitiki zamitundu.

2. Kukaniza kutentha

Kukhazikika kwamatenthedwe a pigment osagwira kutentha kumatanthauza kuchuluka kwa kutenthedwa thupi, kusintha kwake, ndi kutayika kwa pigment pakutentha kotentha.

Inki zochita kupanga zimakhala ndi zitsulo oxides ndi salt, ndi wabwino matenthedwe bata ndi kutentha kukana. Ma pigment a mankhwala opangidwa ndi organic amatha kusintha kapangidwe ka mamolekyulu ndikuwonongeka pang'ono kutentha pang'ono. Makamaka pazinthu za PP, PA, PET, kutentha kwa kutentha kuli pamwambapa 280 ℃. Mukamasankha mitundu, munthu ayenera kulabadira kutentha kwa pigment, ndipo nthawi yolimbana ndi kutentha iyenera kuganiziridwanso kwina. Nthawi yolimbana ndi kutentha nthawi zambiri imakhala 4-10min. .

3. Antioxidant

Mitundu ina ya organic imatha kuwonongeka kwa macromolecular kapena kusintha kwina pambuyo pa makutidwe ndi okosijeni ndipo pang'onopang'ono imazimiririka. Njirayi imakhala yotentha kwambiri mukamakonza, komanso makutidwe ndi okosijeni mukakumana ndi zowonjezera zowonjezera (monga chromate mu chrome chikasu). Pambuyo pa nyanjayo, azo pigment ndi chrome chikasu amagwiritsidwa ntchito limodzi, mtundu wofiira umazimiririka pang'onopang'ono.

4. Kukana kwa acid ndi alkali

Kutha kwa zinthu zamapulasitiki achikuda kumakhudzana ndi kukana kwamankhwala kwa colorant (asidi ndi kukana kwa alkali, kukana kutsitsa makutidwe ndi okosijeni). Mwachitsanzo, mtundu wofiira wa molybdenum chrome umagonjetsedwa ndi asidi, koma umagwirizana ndi alkalis, ndipo chikasu cha cadmium sichigonjetsedwa ndi asidi. Mitunduyi iwiri ndi utomoni wa phenolic zimachepetsa kwambiri mitundu ina, yomwe imakhudza kutentha kwa nyengo komanso kukana kwa nyengo kwamitundu ndipo imapangitsa kuzimiririka.

Pakutha kwa zinthu zamtundu wa pulasitiki, ziyenera kusankhidwa malinga ndi momwe zinthu zikuyendera ndikugwiritsanso ntchito zinthu zapulasitiki, pambuyo pofufuza zonse zomwe zatchulidwa pamwambapa za utoto wofunikira, utoto, opanga mafunde, zotsalira, zotengera zonyamula komanso anti- zowonjezera kukalamba.


 
 
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