PLA ndeimwe yeakanyanya kutsvagirwa uye yakatarisana ne biodegradable zvinhu mukati uye kunze kwenyika, ine zvekurapa, kurongedza, uye fiber application dziri nzvimbo dzayo nhatu dzakakurumbira dzekushandisa. PLA inonyanya kugadzirwa kubva kune yakasikwa lactic acid, ine yakanaka biodegradability uye biocompatibility. Hupenyu hwayo huremerwa panharaunda yakadzikira zvakanyanya pane iyo yepetroleum yakavakirwa zvinhu, uye inoonekwa seyakanyanya kuvimbisa yakasvibira yekurongedza zvinhu.
Polylactic acid (PLA) inogona kuparara zvachose kuita kabhoni dhaikisaidhi nemvura pasi pemamiriro echisikigo mushure mekuraswa. Iine kumira zvakanaka kwemvura, mechanical properties, biocompatibility, inogona kutorwa nezvisikwa, uye haina kusvibiswa kune zvakatipoteredza. PLA inewo yakanaka mechanical properties. Iine simba rekudzivirira rakakwirira, kushanduka kwakanaka uye kugadzikana kwekupisa, plastiki, processability, isina kushanduka, yakanaka kupindira kune okisijeni uye mhute yemvura, pamwe nekujeka kwakanaka, anti mold uye antibacterial properties, nehupenyu hwebasa remakore 2-3.
Film based food package
Iyo inonyanya kukosha yekuita chiratidzo chemidziyo yekurongedza ndeyekufema, uye iyo ndima yekushandisa yechinhu ichi mukurongedza inogona kutariswa zvichienderana nekusiyana kwayo kufema. Zvimwe zvinhu zvekurongedza zvinoda oxygen permeability kuti ipe oxygen yakakwana kune chigadzirwa; Zvimwe zvinhu zvekurongedza zvinoda okisijeni barriers zvivakwa maererano nechinhu, senge chinwiwa kurongedza, izvo zvinoda zvinhu zvinogona kudzivirira okisijeni kupinda mupakeji uye nekudaro kuvharisa mold kukura. PLA ine gasi chipingamupinyi, chipingamupinyi chemvura, kujeka, uye kudhinda kwakanaka.
Transparency
PLA ine kujeka uye kupenya kwakanaka, uye kuita kwayo kwakanaka kunofananidzwa nebepa regirazi nePET, izvo zvisina mamwe mapurasitiki anoodegradable. Kujeka uye kupenya kwePLA ndeye 2-3 nguva yeyakajairika PP firimu uye gumi nguva iyo yeLDPE. Kujeka kwayo kwepamusoro kunoita kuti kushandiswa kwePLA kuve kurongedza zvinhu zvinoyevedza. Zvekurongedza zvihwitsi, parizvino, akawanda mapipi ekurongedza pamusika kushandiswaPLA yekurongedza firimu.
Kuonekwa uye kuita kweizvikurongedza firimuakafanana neyechinyakare pipi yekurongedza firimu, ine kujeka kwepamusoro, kuchengetwa kwepfundo kwakanakisa, kudhindwa, uye simba. Iyo ine zvakare yakanakisa chipingamupinyi zvivakwa, izvo zvinogona kuchengetedza zvirinani kunhuhwirira kwe candy.
chipingamupinyi
PLA inogona kugadzirwa kuita zvigadzirwa zvemufirimu zvitete zvine kujeka kwepamusoro, zvakanaka zvipingamupinyi zvivakwa, zvakanakisa processability, uye michina zvivakwa, izvo zvinogona kushandiswa kuchinjika kurongedza kwemichero nemiriwo. Inogona kugadzira nzvimbo yakakodzera yekuchengetera michero nemiriwo, kuchengetedza simba rayo, kunonoka kuchembera, uye kuchengetedza ruvara rwayo, hwema, kuravira, uye chitarisiko. Asi kana ikashandiswa kune chaiyo yekurongedza chikafu zvinhu, zvimwe zvigadziriso zvichiri kudikanwa kuti zvienderane nehunhu hwechikafu pachacho, kuitira kuti uwane zvirinani ekurongedza.
Semuenzaniso, mune zvinoshanda zvekushandisa, zviedzo zvakaona kuti mafirimu akasanganiswa ari nani pane mafirimu akachena. Iye Yiyao akarongedza broccoli neakachena PLA firimu uye PLA composite firimu, ndokuichengeta pa (22 ± 3) ℃. Aigara akaedza kuchinja kwezvakasiyana-siyana zvehupenyu uye biochemical zviratidzo zve broccoli panguva yekuchengetedza. Mhedzisiro yacho yakaratidza kuti PLA inoumbwa firimu ine yakanaka kuchengetedza mhedzisiro pane broccoli inochengetwa pakamuri tembiricha. Inogona kugadzira humidity level uye mhepo inodzorwa mukati mebhegi rekurongedza iro rinobatsira kudzora kufema kwe broccoli uye metabolism, kuchengetedza kutaridzika kwe broccoli uye kuchengetedza kunhuhwirira kwayo kwepakutanga uye kuravira, nekudaro ichiwedzera hupenyu hwesherufu ye broccoli pakupisa kwekamuri ne23. mazuva.
Antibacterial basa
PLA inogona kugadzira isina kusimba acidic nharaunda pamusoro pechigadzirwa, ichipa hwaro hweantibacterial uye anti mold zvivakwa. Kana mamwe maantibacterial agents akashandiswa pamwe chete, iyo antibacterial rate inogona kusvika pamusoro pe90%, ichiita kuti ive yakakodzera kune antibacterial packaging yechigadzirwa. Yin Min akadzidza nezvekuchengetedza kwerudzi rutsva rwePLA nano antibacterial composite film pahowa hunodyika vachishandisa Agaricus bisporus uye Auricularia auricula semuenzaniso, kuitira kuwedzera hupenyu hwesherufu hwehowa hunodyiwa uye kuchengetedza chimiro chavo chemhando yakanaka. Mhedzisiro yacho yakaratidza kuti iyo PLA/rosemary yakakosha oiri (REO)/AgO inoumbwa firimu inogona kunyatso kunonoka kuderedzwa kwevhitamini C yemukati muauricularia auricula.
Kana ichienzaniswa nefirimu reLDPE, firimu rePLA, uye firimu rePLA/GEO/TiO2, mvura inopindirana yePLA/GEO/Ag firimu inoumbwa yakakwira zvakanyanya kudarika mamwe mafirimu. Kubva pane izvi, zvinogona kugumiswa kuti zvinogona kudzivirira zvinobudirira kuumbwa kwemvura yakanyungudutswa uye kuwana mugumisiro wekudzivisa kukura kwe microbial; Panguva imwecheteyo, inewo yakanakisa antibacterial effect, iyo inogona kunyatso kuvharidzira kubereka kwehutachiona panguva yekuchengetedza nzeve yegoridhe, uye inogona kuwedzera zvakanyanya hupenyu hwesherufu kusvika kumazuva gumi nematanhatu.
Kuenzaniswa neyakajairika PE yekudyara firimu, PLA ine zvirinani maitiro
Enzanisa kuchengetedza mhedzisiro yePE plastiki firimukuputira uye PLA firimu pane broccoli. Mhedzisiro yacho yakaratidza kuti kushandisa PLA firimu kurongedza kunogona kutadzisa yero uye girobhu kudururwa kwe broccoli, kunyatso chengetedza zvirimo zve chlorophyll, vhitamini C, uye soluble solids mu broccoli. Firimu yePLA ine yakanakisa gasi yakasarudzika permeability, iyo inobatsira kugadzira yakaderera O2 uye yakakwirira CO2 chengetedzo nharaunda mukati mePLA yekurongedza mabhegi, nekudaro ichivharira zviitiko zvehupenyu zve broccoli, kuderedza kurasikirwa kwemvura uye kushandiswa kwezvinovaka muviri. Mhedzisiro yacho yakaratidza kuti kana ichienzaniswa nePE plastiki yekuputira kurongedza, PLA firimu kurongedza kunogona kuwedzera hupenyu hwesherufu ye broccoli pakupisa kwekamuri nemazuva 1-2, uye kuchengetedza kwakakosha.
Nguva yekutumira: Oct-09-2024