PLA ndi imodzi mwazinthu zomwe zafufuzidwa kwambiri komanso zomwe zimagwiritsidwa ntchito kwambiri padziko lonse lapansi komanso padziko lonse lapansi, ndipo ntchito zachipatala, zopakira, ndi fiber zili madera ake atatu otchuka. PLA imapangidwa makamaka kuchokera ku lactic acid, yomwe ili ndi biodegradability yabwino komanso kuyanjana kwachilengedwe. Katundu wake wamoyo pachilengedwe ndiwotsika kwambiri kuposa wamafuta amafuta, ndipo amatengedwa ngati zinthu zobiriwira zobiriwira zomwe zimalonjeza kwambiri.
Asidi wa Polylactic (PLA) amatha kusungunuka kukhala mpweya woipa ndi madzi pansi pa chilengedwe atatayidwa. Imakhala ndi kukana madzi abwino, makina, biocompatibility, imatha kutengeka ndi zamoyo, ndipo ilibe kuipitsa chilengedwe. PLA imakhalanso ndi makina abwino. Lili ndi mphamvu zotsutsa kwambiri, kusinthasintha kwabwino komanso kukhazikika kwamafuta, pulasitiki, kusinthika, kusasinthika, kutsekemera bwino kwa mpweya ndi mpweya wamadzi, komanso kuwonekera bwino, anti nkhungu ndi antibacterial properties, ndi moyo wautumiki wa zaka 2-3.
Makanema otengera chakudya chamafuta
Chizindikiro chofunikira kwambiri pakupanga zida ndikupumira, ndipo gawo lomwe limagwiritsidwa ntchito pamapaketi lingathe kutsimikiziridwa kutengera kupuma kwake kosiyana. Zida zina zomangirira zimafunikira mpweya wokwanira kuti upereke mpweya wokwanira kwa mankhwalawa; Zida zina zonyamula katundu zimafuna katundu wolepheretsa mpweya wa okosijeni malinga ndi zinthu, monga zopangira zakumwa, zomwe zimafuna zipangizo zomwe zingalepheretse mpweya kulowa m'matumba ndipo motero zimalepheretsa nkhungu kukula. PLA ili ndi chotchinga mpweya, chotchinga madzi, kuwonekera, komanso kusindikiza kwabwino.
Kuwonekera
PLA imakhala yowonekera bwino komanso yonyezimira, ndipo magwiridwe ake abwino kwambiri amafanana ndi a pepala lagalasi ndi PET, zomwe mapulasitiki ena osawonongeka alibe. Kuwonekera ndi kuwala kwa PLA ndi 2-3 nthawi ya filimu wamba PP ndi 10 nthawi LDPE. Kuwonekera kwake kwakukulu kumapangitsa kugwiritsa ntchito PLA ngati zonyamula katundu zokondweretsa. Pakuyika maswiti, pakadali pano, maswiti ambiri amapaka pamsikafilimu yodzaza ndi PLA.
Mawonekedwe ndi machitidwe a izifilimu yonyamulandizofanana ndi filimu yopangira maswiti yachikhalidwe, yowonekera kwambiri, kusunga bwino mfundo, kusindikiza, komanso mphamvu. Ilinso ndi zotchinga zabwino kwambiri, zomwe zimatha kusunga bwino kununkhira kwa maswiti.
chotchinga
PLA ikhoza kupangidwa kukhala zinthu zoonda zamakanema zowonekera kwambiri, zotchinga zabwino, kukhazikika bwino, komanso makina amakina, omwe angagwiritsidwe ntchito pakuyika zipatso ndi ndiwo zamasamba. Kukhoza kupanga malo abwino osungiramo zipatso ndi ndiwo zamasamba, kukhalabe ndi mphamvu, kuchedwetsa kukalamba, ndi kusunga mtundu, fungo, kukoma, ndi maonekedwe. Koma zikagwiritsidwa ntchito kuzinthu zenizeni zopangira chakudya, zosintha zina zimafunikirabe kuti zigwirizane ndi mawonekedwe a chakudyacho, kuti akwaniritse bwino pakuyika kwake.
Mwachitsanzo, muzogwiritsira ntchito, zoyesera zapeza kuti mafilimu osakanikirana ndi abwino kuposa mafilimu oyera. Iye Yiyao anapaka broccoli ndi filimu yoyera ya PLA ndi filimu yamagulu a PLA, ndikuisunga pa (22 ± 3) ℃. Nthawi zonse ankayesa kusintha kwa zizindikiro zosiyanasiyana za thupi ndi zamoyo za broccoli panthawi yosungira. Zotsatira zake zidawonetsa kuti filimu yophatikizika ya PLA imateteza bwino broccoli yosungidwa kutentha. Itha kupanga mulingo wa chinyezi komanso mpweya wowongolera mkati mwachikwama cholongedza chomwe chimathandizira kuwongolera kupuma kwa broccoli ndi kagayidwe kake, kusunga mawonekedwe a broccoli ndikusunga kukoma kwake koyambirira ndi kukoma kwake, potero kumakulitsa moyo wa alumali wa broccoli kutentha kwa firiji ndi 23. masiku.
Antibacterial ntchito
PLA ikhoza kupanga malo ofooka acidic pamwamba pa mankhwala, kupereka maziko a antibacterial ndi anti nkhungu katundu. Ngati ma antibacterial ena agwiritsidwa ntchito kuphatikiza, kuchuluka kwa antibacterial kumatha kufika pa 90%, ndikupangitsa kuti ikhale yoyenera kuyika kwa antibacterial ya mankhwalawa. Yin Min adaphunzira za kuteteza kwa mtundu watsopano wa filimu ya PLA nano antibacterial composite pa bowa wodyedwa pogwiritsa ntchito Agaricus bisporus ndi Auricularia auricula monga zitsanzo, kuti awonjezere nthawi ya alumali ya bowa wodyedwa ndikukhalabe ndi khalidwe labwino. Zotsatira zinasonyeza kuti filimu yamagulu a PLA/rosemary essential oil (REO)/AgO ikhoza kuchedwetsa kuchepa kwa vitamini C mu auricularia auricula.
Poyerekeza ndi filimu ya LDPE, filimu ya PLA, ndi filimu ya PLA/GEO/TiO2, kutha kwa madzi a filimu yamagulu a PLA/GEO/Ag ndipamwamba kwambiri kuposa mafilimu ena. Kuchokera pa izi, tinganene kuti zingathe kuteteza mapangidwe a madzi osungunuka ndikukwaniritsa zotsatira zolepheretsa kukula kwa tizilombo toyambitsa matenda; Panthawi imodzimodziyo, imakhala ndi antibacterial effect, yomwe imatha kulepheretsa kubereka kwa tizilombo toyambitsa matenda panthawi yosungira khutu la golide, ndipo imatha kuwonjezera moyo wa alumali mpaka masiku 16.
Poyerekeza ndi kanema wamba wa PE, PLA imakhala ndi zotsatira zabwino
Fananizani zotsatira zotetezaPE pulasitiki filimukukulunga ndi filimu ya PLA pa broccoli. Zotsatira zake zidawonetsa kuti kugwiritsa ntchito kuyika kwa filimu ya PLA kumatha kuletsa chikasu ndi kukhetsa babukoli, ndikusunga zomwe zili mu chlorophyll, vitamini C, ndi zolimba zosungunuka mu broccoli. PLA filimu ali kwambiri mpweya kusankha permeability, amene amathandiza kulenga otsika O2 ndi mkulu CO2 malo yosungirako mkati PLA ma CD matumba, potero kuletsa ntchito moyo wa broccoli, kuchepetsa kutaya madzi ndi kudya zakudya. Zotsatira zake zidawonetsa kuti poyerekeza ndi kuyika kwa pulasitiki ya PE, kuyika kwa filimu ya PLA kumatha kukulitsa moyo wa alumali wa broccoli pa kutentha kwa firiji ndi masiku 1-2, ndipo kusungirako ndikofunikira.
Nthawi yotumiza: Oct-09-2024