Ngokwezibalo ezitholakalayo, amandla okukhiqiza ebhodi elivimbela amanzi e-China asondele amathani ayi-2,000 ngenyanga ngo-2023, okuwukunyuka okukhulu uma kuqhathaniswa namathani angama-800 ngenyanga ngonyaka odlule.Kodwa-ke, amandla anjalo abalwa kuphela ingxenye encane embonini ye-paperboard yaseChina.Ibhodi elivimbela amanzi e-China ikakhulukazi elokufaka ukudla, futhi lidayiselwa kakhulu ezimakethe zaphesheya kwezilwandle.Ukuthi izogcina ukukhula okunempilo esikhathini esizayo kuncike kakhulu ekukhethweni kwenqubomgomo ekhaya naphesheya.
Kusukela lapho simi khona, nazi izitayela ezibalulekile zebhodi lokuvimbela amanzi.
Amakhasimende namuhla awasanelisi ngekhwalithi yokuvimbela emaphakathi.Bafuna izixazululo ezilungiselelwe ukunika amandla ukusebenza okuhle kokupakisha ezinhlelweni ezahlukene.Ibhodi kufanele imelane noketshezi futhi imelane namafutha ngezinto eziklanyelwe njengezinga eliphansi lokudluliswa komhwamuko (MVTR) noma izinga eliphansi lokudlulisa umoya-mpilo (OTR), okudingekayo ekusetshenzisweni kokugcina okufunayo.Isibonelo, i-OTR, ephansi kakhulu njengo-0.02 cm3/m2/ngosuku kuze kube manje, ikhethwa emaphaketheni ezithelo ezomisiwe.Ngokufanayo, ukupakishwa kwezinto eziyimpuphu kudinga i-MVTR ephansi.Ukusabalalisa kwe-acrylic evamile kungahlinzeka kuphela ngamavelu e-MVTR aphakathi kuka-100 kuya ku-200g/m 2/ngosuku, kodwa ukusabalalisa kwe-High Performance Barrier (HPB) kunganikeza inani le-MVTR elingaphansi kuka-50g/m 2/ngosuku noma ngisho no-10g/m 2/ngosuku.
Ukushintshela ku-HPB kancane kancane kusuka kupulasitiki kufakazelwe ngokusetshenziswa okwandayo kwebhodi le-HPB ezingeni lezimboni.Ngokungafani nokupakishwa kokudla okuqaphela kakhulu ukuphepha, ukupakishwa kwezimboni kugcizelela ukusebenza kwesithiyo kanye nezindleko zokukhiqiza.Ukupakishwa kwe-HPB kungahlukaniswa kube ukupakishwa kwenqwaba yezimboni kanye nokupakishwa komkhiqizo wamakhemikhali wansuku zonke.Ukupakishwa kwenqwaba yezimboni kubhekisa kuzo zonke izinhlobo zamasaka amavalvu asetshenziselwa ukubamba izinto eziyimbudumbudu, ezifana usimende nezimpushana zamakhemikhali.Amasaka e-valve yamaphepha ngokuvamile atholakala kumasayizi angama-25 kg noma ama-50 kg.Isithiyo esisekelwe emanzini, njengenye indlela esimeme kupulasitiki, singaqinisekisa ukuvaleka kokushisa kanye nenani le-MVTR ukuze kusekelwe ukusebenza kahle kokupakisha kwamasaka e-valve yephepha ekukhiqizeni ngesivinini esiphezulu.Izinkampani eziphayona ezikhuthaza ukuthuthukiswa kwemikhiqizo ye-HPB zifaka i-Alou, i-BASF, ne-Covestro.I-HPB inganikeza ukusebenza kwesithiyo esifiselekayo kodwa inzuzo yayo futhi inohwebo.Izindleko zokukhiqiza zingenye yezingqinamba ekukhuleni kwayo kwemakethe.Ukupakishwa komkhiqizo wamakhemikhali wansuku zonke kubhekisela ekufakweni kwemikhiqizo efana neyokuhlanza, ishampoo, nokunakekelwa kwesikhumba, iningi layo okuyizikhwama ezingamakhulu ambalwa amakhilogremu kuya kwamabili.Ukupakishwa kwansuku zonke komkhiqizo wamakhemikhali kufuna kakhulu ngokusebenza kwezithiyo kunamasaka ama-valve.Idinga izici ezibalulekile ezifana nokulawula umswakama, ukungangenisi umoya nokuvikela ukukhanya.
Uma kubhekwa iqiniso lokuthi amapulasitiki awaboli, izinto ezivuselelekayo zibukwa ngokuthakazelelwa ngamakhasimende aqaphela imvelo kanye nemikhiqizo, eningi kakhulu okuyizithiyo ezisekelwe ku-bio.Isikhathi esingaphezu konyaka, abakhiqizi abambalwa bethule eyabo imikhiqizo ye-bio-based dispersion, bekhuthaza ukusetshenziswa ezimbonini ezahlukahlukene, ikakhulukazi imboni yokupakisha ukudla.Kusukela ekusakazweni kwesithiyo kuya koyinki wokuphrinta, okuqukethwe okusekelwe ku-bio komkhiqizo kuhluka phakathi kuka-30% no-90%.Ukwethulwa kwezinto ze-nanocellulose kuqhubekisele phambili ukuhlukanisa iphothifoliyo yezithiyo ezisekelwe ku-bio.Izinkampani ezihlinzeka ngezingubo ezibolayo ezibolayo zifaka i-Basf, i-Covestro, i-Siegwerk, i-Wanhua, i-Shengquan, i-Qihong, i-Tangju nokunye. Ukuthuthukiswa kwezinto ezisetshenziswayo ze-nanocellulose emakethe yomhlaba kuseyinsakavukela.Ucwaningo belulokhu lwenzeka ezinhlelweni eziningi nasezimbonini, okuhlanganisa ukwenza amaphepha, okokufaka, amakhemikhali ansuku zonke namabhethri wamandla.Kodwa-ke, ucwaningo oluningi lubhekwa njengokukha phezulu kulesi sigaba, olunye ucwaningo olujulile nophenyo luyadingeka ngokusobala.Ucwaningo lwetiyori kanye nokusetshenziswa okusebenzayo kudinga ukusebenzelana okuseduze.Ukufunda nophenyo kufanele kudlulele ngale kweCellulose Nanofibrils (CNF) noma i-Microfibrillated cellulose (MFC), ukuze kuhlinzekwe izinketho ezengeziwe kumakhasimende ukuze akhethe leyo engase isekele kangcono imfuneko yawo yokupakisha.
U-80% wesidingo somkhiqizo wesithiyo esimeme uvela ezimakethe zaphesheya kwezilwandle zaseChina, njenge-Europe, North America ne-Australia.Isidingo sebhodi elivimbela amanzi emakethe yase-Australia sikhule kakhulu eminyakeni edlule.Inqubomgomo yokuvinjelwa kwepulasitiki e-Hong Kong nayo ibe negalelo ekukhuleni kwebhodi lokuvimba amanzi.Isidingo sayo sasekhaya e-China sibuthakathaka ngokuqhathaniswa okwamanje.Ukuthuthukiswa kwe-aqueous dispersion coating akuncikile kuphela emizamweni yemikhiqizo kodwa futhi nakunqubomgomo yemboni.Phakathi nonyaka odlule noma ngaphezulu, iziphathimandla zendawo e-China zishintshile zisuka ekukhuthazeni ipulasitiki ebolayo iya kwezinye izinto ezingenapulasitiki ezihlukene, ikakhulukazi izinto ezigaywa kabusha nezivuselelekayo.
Isikhathi sokuthumela: Apr-19-2024