I-polymer ephelele—elinganisa izakhiwo ezingokomzimba nokusebenza kwemvelo—ayikho, kodwa i-polybutylene adipate co-terephthalate (PBAT) isondela kakhulu kuneziningi.
Abakhiqizi bama-polymer okwenziwa sekungamashumi eminyaka behluleka ukumisa imikhiqizo yabo ukuthi igcine isendaweni yokulahla imfucumfucu kanye nolwandle, futhi manje bangaphansi kwengcindezi yokuba bazibophezele. Abaningi benza imizamo ephindwe kabili yokuthuthukisa ukugaywa kabusha ukuze kugwenywe abagxeki. Amanye amafemu azama ukubhekana nenkinga kadoti ngokutshala imali kumapulasitiki asuselwa ku-biodegradable biobased njenge-polylactic acid (PLA) ne-polyhydroxyalkanoate (PHA), ngethemba lokuthi ukucekelwa phansi kwemvelo kuzonciphisa okungenani enye imfucuza.
Kodwa kokubili ukugaywa kabusha kanye nama-biopolymers abhekana nezithiyo. Ngaphandle kokuzama iminyaka eminingi, izinga lokugaywa kabusha kwamapulasitiki e-US, ngokwesibonelo, lisengaphansi kuka-10%. Futhi ama-biopolymers-imvamisa imikhiqizo yokuvutshelwa-alwela ukufeza ukusebenza okufanayo kanye nesilinganiso sokukhiqiza sama-polymers okwenziwa amisiwe okuhloswe ukuwashintsha.
I-PBAT ihlanganisa ezinye zezimfanelo ezizuzisayo zama-polymers okwenziwa kanye ne-biobased. Itholakala kumakhemikhali e-petrochemicals-i-purified terephthalic acid (PTA), i-butanediol, ne-adipic acid-kodwa nokho i-biodegradable. Njenge-polymer yokwenziwa, ingakhiqizwa kalula ngezinga elikhulu, futhi inezinto ezibonakalayo ezidingekayo ukwenza amafilimu aguquguqukayo aphikisana nalawo avela kumapulasitiki avamile.
Umenzi we-PTA waseShayina uHengli. Imininingwane ayicacile, futhi inkampani ayitholakalanga ukuze iphawule. Ekudalulweni kwabezindaba nezezimali, u-Hengli uthe ngokuhlukile uhlela isitshalo esingu-450,000 t noma isitshalo esingu-600,000 t samapulasitiki abolayo. Kodwa uma ichaza izinto ezidingekayo ekutshalweni kwezimali, inkampani iqamba i-PTA, i-butanediol, ne-adipic acid.
Ukugijima kwegolide kwe-PBAT kukhulu e-China. Umsabalalisi wamakhemikhali waseShayina iphrojekthi ye-CHEMDO yokuthi ukukhiqizwa kwe-PBAT yaseShayina kuzokhuphukela cishe ku-400,000 t ngo-2022 kusuka ku-150,000 t ngo-2020.
Isikhathi sokuthumela: Feb-14-2022