Okokuqala, ake sazi lezi zinto ezimbili:

Iyini impahla ye-PC?

Embonini, i-polycarbonate (i-Polycarbonate) ibizwa nge-PC. Eqinisweni, izinto ze-PC zingenye yamapulasitiki ethu athuthukile. Isizathu sokuthi kungani isetshenziswa kabanzi ekukhiqizeni kunqunywa ngokuphelele izici zayo. I-PC inezinzuzo eziyingqayizivele zokungashi, okungeyona ubuthi futhi kunemibala. Okubalulekile ukuthi inamandla amakhulu okunweba, izinga lokushisa eliphezulu nokumelana nezinga lokushisa eliphansi, nokunwebeka okuhle. Okubalulekile ukuthi izinga lomkhiqizo oqediwe lihle. Lezi ziye zaba yisinqumo sefenisha eminingi ukukhetha i-PC njengempahla eluhlaza. Isizathu esibalulekile.

Iyini impahla ye-PP?

I-PP isifinyezo se-polypropylene (i-Polypropylene), futhi iyilokho esivame ukukubiza ngokuthi i-Fold-fold plastic, ephinde ibe uhlobo lwepulasitiki yokukhiqiza ezimbonini. I-PP iwumkhiqizo wepulasitiki wokwenziwa, kodwa futhi inezinzuzo zayo kanye nokubi. Amabhodlela amaningi ezingane azokwenziwa ngezinto ze-PP ngoba amelana namazinga okushisa aphezulu futhi alungile ngokuphelele ngaphezu kuka-100 degrees Celsius, ngakho-ke afaneleka izidingo zokukhipha amagciwane amanzi abilayo amabhodlela ezingane. Ukuzinza kwe-PP kuhle kakhulu.

Ngakho-ke kungani embonini yefenisha, izinto ze-PC zishintshwa kancane kancane yizinto ze-PP? Izizathu zimi kanje:

Isici sezindleko

Izindleko zokuthengwa kwezinto ezingavuthiwe ze-PC resin ziphezulu kakhulu kune-PP. I-PC eluhlaza kakhulu ingaphezu kuka-20,000 ton, kanti izindleko ze-PP zingu-10,000. I-PP ingenye yamaphrojekthi asetshenziswa kakhulu.

Umqondo wemfashini

Ngokuphathelene nokudluliswa kokukhanya kwamapulasitiki, i-PC resin iyawina. I-PC ingelinye lamapulasitiki amathathu asobala anokudlulisa ukukhanya okuhle kakhulu. Ifenisha eqediwe isobala futhi ayinambala. Ukungena kwe-pp kubi kakhulu, futhi i-PP evamile inomuzwa ofana nenkungu, othuthukisa ukuthungwa kwezinto futhi wenze umbala ube matte kakhulu, okwenza uthuthuke kakhulu. Ukukhethwa kwemibala eminingi nakho sekuphenduke intandokazi kukho. Izizathu zokwamukela. Izinketho ezicebile, hhayi njengento eyodwa njenge-PC.

Izici zezinto ezibonakalayo

Ukuqina nokuqina kwalawa mapulasitiki amabili ahlukene. I-PC inobulukhuni obuhle kakhulu, i-PP inobulukhuni obuphansi kakhulu ekamelweni lokushisa, futhi ingakhubazeka kalula futhi igotshwe ngamandla angaphandle. Kodwa-ke, i-PP inokuqina okuhle kakhulu, okuvame ukubizwa ngokuthi i-Baizhe glue, futhi isetshenziswa kakhulu kwifenisha. Ukuqina kwayo kuyenza iqine futhi ibe namandla angcono okuthwala.

Ukwenziwa

I-fluidity yomjovo we-PP muhle kakhulu futhi kulula ukuwenza, kuyilapho i-fluidity ye-PC impofu kakhulu futhi kunzima ukuhambisa iglue. Ngaphezu kwalokho, i-PC kulula ukubola futhi iguqule umbala ekushiseni okuphezulu ekubunjweni komjovo, futhi ukubumba komjovo kudinga isikulufu se-PC esenziwe ngokwezifiso. Ngakho-ke, izindleko zokucubungula imikhiqizo ye-PC ziphezulu. Ngesikhathi esifanayo, lapho imikhiqizo yomjovo we-PC yenziwa, ngenxa yezimpawu zayo ezisobala futhi kulula ukubona amabhamuza nokungcola ngaphakathi, isivuno siphansi kakhulu. Uma kuyimakethe ephezulu, kunzima kakhulu ukulawula ikhwalithi yemikhiqizo ye-PC, ebuye ikhulise kakhulu izindleko zokukhiqiza.

Isici sokuphepha

Imikhiqizo ye-PC ingase ibole i-bisphenol A, eyingozi empilweni yomuntu. Ukushisa okuphezulu kwe-PC akukhiqizi i-bisphenol A, kodwa i-bisphenol A iyimpahla eluhlaza yokukhiqiza amapulasitiki e-PC. Ngemuva kokuhlanganiswa kwe-bisphenol A, i-PC iyakhiqizwa. Ngemva kokuhlanganiswa kwamakhemikhali, i-bisphenol A yasekuqaleni ayisekho. Ukuthi nje le nqubo yokuhlanganiswa iyinqubo, futhi kukhona ukuphamba kule nqubo, kunzima ukusabela okuphelele okungu-100%, futhi kungase kube ne-bisphenol A eyinsalela (okungenzeka). Uma i-PC ihlangabezana nezinga lokushisa eliphezulu, izobangela i-bisphenol A ukuthi iphume epulasitiki. Ngakho-ke, uma kune-bisphenol A eyinsalela kokokusebenza, kokubili imvula eshisayo nemvula ebandayo kuzoba khona, futhi imvula ebandayo ihamba kancane kakhulu.

Sekukonke, ukusebenza kwe-PC ne-PP kuhlukile, futhi akunakwenzeka ukumane unqume ukuthi ubani omuhle nokuthi ubani omubi. Kusadingeka ukukhetha umkhiqizo ongcono kakhulu wobubanzi bokusetshenziswa. Futhi i-PP isetshenziswa kabanzi emkhakheni wefenisha, yingakho ifenisha ye-PP ishintsha kancane kancane ifenisha ye-PC.

Noma yimiphi imibuzo ngicela ungithinteAndrew@sinotxj.com