Menene kayan PLA

Menene kayan PLA?

Polylactic acid, wanda kuma aka sani da PLA, shine monomer na thermoplastic wanda aka samo daga sabuntawa, tushen kwayoyin halitta kamar sitaci na masara ko sukari.Yin amfani da albarkatun halittu ya sa samar da PLA ya bambanta da yawancin robobi, waɗanda aka samar ta hanyar amfani da makamashin burbushin halittu ta hanyar distillation da polymerization na man fetur.

Duk da bambance-bambancen kayan albarkatun ƙasa, ana iya samar da PLA ta amfani da kayan aiki iri ɗaya kamar robobin petrochemical, yana mai da tsarin masana'antar PLA ingantaccen farashi.PLA ita ce ta biyu mafi samar da bioplastic (bayan sitaci na thermoplastic) kuma yana da halaye iri ɗaya zuwa polypropylene (PP), polyethylene (PE), ko polystyrene (PS), da kuma kasancewa mai lalacewa.

Cibiyar kayan da za a iya lalata su ta ba da rahoton cewa kayan PLA suna da kyakkyawar damar aikace-aikacen a fagen marufi, amma ba cikakke ba ne a cikin tauri, juriya mai zafi, ƙwayoyin cuta da kaddarorin shinge.Lokacin amfani da marufi na sufuri, fakitin ƙwayoyin cuta da fakitin fasaha tare da manyan buƙatu don waɗannan kaddarorin, yana buƙatar haɓakawa.Yaya game da aikace-aikacen PLA a fagen marufi?Menene fa'idodi da iyakoki?

Ana iya gyara waɗannan gazawar PLA ta hanyar copolymerization, haɗawa, filastik da sauran gyare-gyare.A kan jigo na riƙe fa'idodin gaskiya da lalacewa na PLA, zai iya ƙara haɓaka ƙazanta, ƙarfi, juriya mai zafi, shamaki, haɓakawa da sauran kaddarorin PLA, rage farashin samarwa, kuma ya sa ana amfani da shi sosai a cikin marufi.
Wannan labarin yana gabatar da ci gaban bincike na gyare-gyaren PLA da aka yi amfani da shi a fagen marufi
1. Lalacewa

Ita kanta PLA tana da ɗan kwanciyar hankali a yanayin zafin ɗaki, amma yana da sauƙi a ƙasƙanta da sauri a cikin ɗan ƙaramin yanayin zafi mai zafi, yanayin tushen acid ko yanayin ƙananan ƙwayoyin cuta.Abubuwan da ke shafar lalacewar PLA sun haɗa da nauyin kwayoyin halitta, yanayin crystalline, microstructure, zafin muhalli da zafi, ƙimar pH, lokacin haske da ƙananan ƙwayoyin muhalli.

Lokacin da aka yi amfani da marufi, tsarin lalata na PLA ba shi da sauƙin sarrafawa.Misali, saboda lalacewarsa, kwantenan PLA galibi ana amfani da su a cikin marufi na abinci a kan ɗakunan ajiya na ɗan gajeren lokaci.Don haka, yana da mahimmanci don sarrafa ƙimar lalacewa ta hanyar doping ko haɗa wasu kayan a cikin PLA bisa ga dalilai kamar yanayin kewayawar samfur da rayuwar shiryayye, don tabbatar da cewa samfuran da aka ƙulla za a iya kiyaye su cikin aminci a cikin lokacin inganci kuma a lalata su cikin aminci. lokaci bayan watsi.

2. Shamaki yi

Shamaki shine ikon toshe watsa iskar gas da tururin ruwa, kuma ana kiranta danshi da juriya na iskar gas.Barrier yana da mahimmanci musamman ga marufi na abinci.Misali, marufi, marufi mai kumburi da gyare-gyaren fakitin yanayi duk suna buƙatar shingen kayan ya yi kyau sosai;Tsare-tsare yanayi na lokaci-lokaci na adana 'ya'yan itatuwa da kayan marmari na buƙatar daban-daban permeability na kayan zuwa gases kamar oxygen da carbon dioxide;Marufi mai tabbatar da danshi yana buƙatar juriya mai kyau na kayan;Marufi Anti tsatsa yana buƙatar cewa kayan zai iya toshe gas da danshi.

Idan aka kwatanta da babban shinge na nailan da polyvinylidene chloride, PLA yana da ƙarancin iskar oxygen da shingen tururin ruwa.Lokacin amfani da marufi, ba shi da isasshen kariya ga abinci mai mai.

3.Juriya mai zafi
Rashin juriya mai zafi na kayan PLA shine saboda jinkirin ƙimar crystallization da ƙarancin crystallinity.Matsakaicin nakasar thermal na amorphous PLA kusan 55 ℃ ne kawai.Bambarar polylactic acid da ba a canza ba yana da ƙarancin juriyar zafi.Saboda haka, PLA bambaro ya fi dacewa da abin sha mai dumi da sanyi, kuma zafin haƙuri shine - 10 ℃ zuwa 50 ℃.

Koyaya, a cikin amfani mai amfani, bambaro na shayar shayi na madara da sandar motsa kofi suna buƙatar saduwa da juriya mai zafi sama da 80 ℃.Wannan yana buƙatar gyara akan tushen asali, wanda zai iya canza kaddarorin PLA daga bangarori biyu: gyaran jiki da sinadarai.Haɗawa da yawa, faɗaɗa sarkar da daidaitawa, cika inorganic da sauran fasahohin za a iya ɗaukar su don canza ƙarancin juriyar zafi na PLA kanta da karya shingen fasaha na kayan bambaro na PLA.

Ƙayyadadden aikin shine cewa ana iya sarrafa tsayin sarkar reshe na PLA ta hanyar canza rabon abinci na PLA da wakili mai lalata.Tsawon sarkar reshe, mafi girman nauyin kwayoyin halitta, mafi girma TG, an inganta ƙarfin kayan aiki kuma an inganta kwanciyar hankali na thermal, don inganta yanayin zafi na PLA kuma ya hana yanayin lalata yanayin zafi na PLA.