Kunyangwe ese ari maviri ari biodegradable zvinhu, masosi awo akasiyana. PLA inotorwa kubva kuzvinhu zvipenyu, nepo PKAT inotorwa kubva kune petrochemical zvinhu.
PLA's monomer material is lactic acid, iyo inowanzokuyiwa nezvirimwa zvehusk sechibage kuti ibvise starch, yozoshandurwa kuita glucose isina kucheneswa.
Iyo glucose inoviriswa nenzira yakafanana nedoro kana doro, uye pakupedzisira iyo lactic acid monomer inonatswa. Lactic acid inogadziriswazve nelactide kune poly (lactic acid).
BAT polyterephthalic acid - butanediol adipate, ndeye petrochemical biodegradable plastiki, kubva muindasitiri yepetrochemical, iyo huru monomer ndeye terephthalic acid, butanediol, adipic acid.
Kana iyo PLA iri mudiki uye akasimba muchinda, saka PBAT inyoro yevakadzi network tsvuku. PLA ine yakakwira modulus, yakakwira tensile simba uye yakashata ductility, nepo PKAT ine yakakwira fracture yekukura mwero uye yakanaka ductility.
PLA yakafanana nePP mune zvakajairika mapurasitiki, jekiseni kuumba, extrusion, kuvhuvhuta kuumbwa, blister inogona kuita zvese, PBAT yakafanana neLDPE, firimu bhegi kurongedza kwakanaka.
PLA yakareruka yero pajekerere yakasimba, yakanaka thermal kugadzikana, kupisa tembiricha 170 ~ 230 ℃, ine good solvent resistance, inogona kugadzirwa nenzira dzakasiyana siyana, senge extrusion, spinning, biaxial stretching, injection blow molding.
Zvakafanana nePP, kujeka kwakafanana nePS, PLA yakachena haigone kushandiswa kugadzira zvakananga zvigadzirwa, PLA ine simba rakawanda uye compression modulus, asi yakaoma uye isina kusimba kusimba, kushaya kuchinjika uye elasticity, nyore kukotama deformation, kukanganisa uye kubvarura. kuramba kune urombo.
PLA inowanzo shandiswa kugadzira zvigadzirwa zvinoparara mushure mekugadziriswa, senge midziyo yekudyira inoraswa nemashanga.
PBAT isemi-crystalline polymer, kazhinji tembiricha yecrystallization inotenderera 110 ℃, uye panonyungudika inenge 130 ℃, uye density iri pakati pe1.18g/mL ne1.3g/mL. Iyo crystallinity yePBAT inenge 30%, uye Shore yakaoma iri pamusoro pe 85. Kugadziriswa kwePBAT kwakafanana neLDPE, uye nzira yakafanana inogona kushandiswa pakuputika kwefirimu. Mechanical zvimiro zveese PBA uye PBT hunhu, yakanaka ductility, kureba panguva yekuzorora, kupisa kupisa uye kukanganisa kuramba. Naizvozvo, izvo zvinosvibisa zvigadzirwa zvichave zvakare zvakagadziridzwa, kunyanya kuitira kuti isangane nekuita zvinodiwa zvezvigadzirwa, asiwo kuderedza mutengo.
Kunyangwe PLA nePBAT vaine mashandiro akasiyana, vanogona kutsigirana! PLA inowedzera kuoma kwePBAT firimu, PBAT inogona kuvandudza kushanduka kwePLA, uye pamwe chete inozadzisa chikonzero chekuchengetedza kwezvakatipoteredza.
Parizvino, mazhinji emashandisirwo akavakirwa paPBAT zvinhu pamusika zvigadzirwa zvebhegi membrane. PBAT yakagadziridzwa zvinhu zvinonyanya kushandiswa kuridza firimu kugadzira mabhegi, senge mabhegi ekutenga.
Zvinhu zvePLA zvinonyanya kushandiswa kugadzira jekiseni, uye PLA yakagadziridzwa zvinhu zvinonyanya kushandiswa midziyo yekudyira inoraswa, senge mabhokisi eupfu anoparara, mashanga anoparara, nezvimwe.
Kwenguva refu, huwandu hwePLA hushoma pane hwePBAT. Nekuda kwehombe yebhodhoro rePLA tekinoroji yekugadzira uye kushomeka kwekubudirira mukufambira mberi kwelactide, kugona kwePLA muChina hakuna kuwedzera zvakanyanya, uye mutengo wePLA mbishi zvinhu unodhura. Huwandu hwemabhizinesi gumi nematanhatu ePLA akaiswa mukugadzirwa, ari kuvakwa kana kurongwa kuvakwa kumba nekune dzimwe nyika. Kusimba kwekugadzira kwakaiswa mukugadzirwa kwe400,000 matani / gore, kunyanya kune dzimwe nyika; Kuvaka huwandu hwe490,000 matani / gore, kunyanya mudzimba.
Kusiyana neizvi, kuChina, zvigadzirwa zvePBAT kugadzirwa zviri nyore kuwana, uye tekinoroji yekugadzira yakura. Kugona kwePBAT uye huwandu huri kuvakwa hwakakura. Nekudaro, mutsauko wesimba rekuburitsa nguva yePBAT inogona kurebeswa nekuda kwekuchinja kwemutengo weBDO, uye mutengo uripo wePBAT uchiri kudhura kupfuura PLA.
Sezvinoratidzwa mune tafura inotevera, ikozvino PBAT iri kuvakwa + yakarongwa kuvaka inoverengerwa zvichienderana nehuwandu hwekutanga-chikamu chekugadzira, pamwe neiyo yepakutanga kugadzirwa kwesimba, panogona kunge paine 2.141 miriyoni matani ekugadzira kugona muna 2021. Tichifunga nezveimwe chaiyo-chikamu chekutanga kugadzirwa hakugone kuiswa zvakanaka mukushanda, huwandu hwekugadzira hunosvika mamirioni 1.5 matani.
Iko kukosha kwepakutanga kwePLA kwakakwirira kudarika PBAT, asi nokuti zvigadzirwa zvemembrane bhegi zvinotanga kukanganiswa nemutemo, zvichiita kuti PBAT iwane zvishoma, panguva imwe chete, mutengo wePBAT monomer BDO wakasimuka zvakanyanya, ikozvino runako network red PBAT. kwave kukurumidza kubata mutengo wePLA.
Nepo PLA ichiri muchinda mudiki akanyarara, mutengo wacho wakadzikama, pane anopfuura 30,000 yuan/ton.
Izvo zviri pamusoro apa kuenzanisa kwakawanda kwezvinhu zviviri. Paunenge uchitaurirana nevemukati meindasitiri nezve rudzi rwezvinhu zvinonyanya kufarirwa mune ramangwana, munhu wese ane maonero akasiyana. Vamwe vanhu vanofunga kuti PLA ichava huru mune ramangwana.
Vamwe vanhu vanofunga kuti PBAT ichava iyo yakawanda, nokuti tichifunga kuti PLA inonyanya kubva kuchibage, dambudziko rekuwanikwa kwechibage rinogona kugadziriswa here? Kunyangwe PBAT iri petrochemical yakavakirwa, ine zvimwe zvakanakira mune yakabikwa zvinhu sosi uye mutengo.
Muchokwadi, ivo imhuri, hapana kukakavara kukuru, kungoita shanduko yekushandisa, dzidza kubva kune mumwe nemumwe kuti utambe simba guru!
Nguva yekutumira: 19-10-21