Sekureva kwehuwandu huripo, huwandu hwekugadzira kwebhodhi rinovharirwa nemvura muChina hunosvika zviuru zviviri zvematani pamwedzi muna 2023, uko kuri kuwedzera kukuru kana zvichienzaniswa nematani mazana masere pamwedzi gore rapfuura.Nekudaro, huwandu hwakadai hwakangoverengera chikamu chidiki muChina paperboard indasitiri.Mvura-based barrier board muChina inonyanya kurongedza chikafu, uye inonyanya kutengesa kumusika wekunze.Kunyangwe zvichatsigira kukura kune hutano mune ramangwana zvakanyanya zvinoenderana nesarudzo dzepolicy kumba nekune dzimwe nyika.
Kubva patimire, heano maitiro akakosha emvura-based barrier board.
Vatengi mazuvano havachagutsikane neavhareji yekuvharira mhando.Ivo vari kutsvaga mhinduro dzakagadzirirwa kuti dzigonese kuita kwakaringana kurongedza mumashandisirwo akasiyana.Bhodhi racho rinofanirwa kunge riine mvura uye rinopokana negirizi nezvinhu zvakagadzirirwa senge yakaderera mwando vapor transmission rate (MVTR) kana yakaderera oxygen transmission rate (OTR), iyo inodiwa mukuda kwekupedzisira-kushandiswa.Semuenzaniso, OTR, yakaderera se 0.02 cm3/m2/zuva kusvika zvino, inosarudzwa mukutakura michero yakaomeswa.Saizvozvo, hupfu zvinhu kurongedza zvinoda yakaderera MVTR.Traditional acrylic dispersion inogona chete kupa MVTR tsika pakati pe100 kusvika 200g/m 2/zuva, asi High Performance Barrier (HPB) dispersion inogona kupa MVTR kukosha kwakaderera pane 50g/m 2/zuva kana kunyange 10g/m 2/zuva.
Kuchinja zvishoma nezvishoma kuenda kuHPB kubva kupurasitiki kwakaonekwa nekuwedzera kushandiswa kweHPB board padanho reindasitiri.Kusiyana nekurongedzerwa kwechikafu kunonyanya kuchengetedzwa, kurongedza kwemaindasitiri kunosimbisa kuvharidzira kuita uye mutengo wekugadzira.HPB kurongedza inogona kukamurwa kuita maindasitiri akawanda ekuisa uye yemazuva ese makemikari chigadzirwa kurongedza.Industrial bulk packaging inoreva marudzi ese emasaga evharuvhu anoshandiswa kubata zvinhu zvegranular, senge simende nehupfu hwemakemikari.Mapepa evharuvhu masaga anowanzo kuwanikwa pahukuru hwe25 kg kana 50 kg.Mvura-yakavakirwa chipingamupinyi, seimwe inoenderera mberi kune epurasitiki, inogona kuvimbisa kupisa sealability uye MVTR kukosha kwekutsigira zvakanyanya kurongedza kuita kwemasaga evharuvhu yepepa mukugadzira-kumhanya kukuru.Makambani ekupayona ari kusimudzira kuvandudzwa kwezvigadzirwa zveHPB anosanganisira Alou, BASF, uye Covestro.HPB inogona kupa inodiwa chipingamupinyi kuita asi bhenefiti yayo inewo kutengeserana-offs.Mutengo wekugadzira chimwe chezvipingamupinyi pakukura kwayo kwemusika.Zuva nezuva kemikari chigadzirwa packaging inoreva kurongedza kwezvigadzirwa senge detergent, shampoo, uye kuchengetedza ganda, mazhinji acho ari masaga emazana akati wandei magiramu kusvika makirogiramu maviri.Kurongedza kwechigadzirwa chemakemikari ezuva nezuva kuri kudiwa zvakanyanya maererano nekuita kwezvipingamupinyi pane masaga evharuvhu.Inoda zvinhu zvakakosha zvakadai sekudzivirira humidity, airtightness uye chiedza chekudzivirira.
Tichifunga nezve chokwadi chekuti mapurasitiki haagadzirike, zvinhu zvinogoneka zvinotaridzirwa zvinotariswa nekufarirwa nevatengi vanoziva eco-conscious uye mabhureki, akanyanya kuwanda ayo ari bio-based zvipingamupinyi.Kweanopfuura gore, vagadziri vashoma vakatangisa yavo bio-based dispersion zvigadzirwa, vachisimudzira mashandisirwo mumaindasitiri akasiyana, kunyanya indasitiri yekurongedza chikafu.Kubva pakupararira kwezvipingamupinyi kusvika pakudhinda ingi, iyo bio-yakavakirwa zvemukati yechigadzirwa inosiyana pakati pe30% ne90%.Kuunzwa kwezvinhu zvenanocellulose kwakawedzera kusiyanisa portfolio yebio-based zvipingamupinyi.Makambani ari kupa biodegradable coatings anosanganisira Basf, Covestro, Siegwerk, Wanhua, Shengquan, Qihong, Tangju uye nezvimwe.Tsvagiridzo dzanga dzichiitika mumashandisirwo mazhinji uye maindasitiri, kusanganisira kugadzira mapepa, machira, makemikari ezuva nezuva uye mabhatiri emagetsi.Nekudaro, tsvagiridzo zhinji dzinoonekwa sedzepamusoro pane ino nhanho, kuwedzera-yakadzika kudzidza uye kuferefeta kunodiwa zvakajeka.Tsvagiridzo yeteoretical uye inoshanda inoshanda inofanirwa kuve mukubatana pamwe chete.Kudzidza uye kuferefeta kunofanirwa kupfuura Cellulose Nanofibrils (CNF) kana Microfibrillated cellulose (MFC), kuitira kuti vape dzimwe sarudzo dzevatengi kuti vasarudze iyo inogona kutsigira zvakanyanya zvavanoda zvekurongedza.
80% yezvinodiwa zveyakagadziriswa zvipingamupinyi chigadzirwa zvinobva kumisika yekuChina yekunze, seEurope, North America neAustralia.Kudiwa kwemvura-based barrier board mumusika weAustralia kwakakura zvakanyanya mumakore apfuura.Plastic restriction policy muHong Kong yakabatsirawo mukukura kwemvura-based barrier board.Kudiwa kwayo mudzimba muChina hakuna kusimba panguva ino.Iko kuvandudzwa kweaqueous dispersion coating haingotsamiri pakuedza kwemhando chete asiwo pamutemo weindasitiri.Mugore rapfuura kana kudarika, zviremera zvemuno muChina zvakachinja kubva pakusimudzira mapurasitiki anogona kuparara kuenda kune akasiyana mapurasitiki asina mamwe, kunyanya anogona kushandiswazve uye anogona kushandiswazve.
Nguva yekutumira: Kubvumbi-19-2024