{"id":106,"date":"2024-03-04T21:07:06","date_gmt":"2024-03-04T20:07:06","guid":{"rendered":"https:\/\/www.3dprint-italia.it\/WP\/2024\/03\/04\/pla\/"},"modified":"2024-05-25T06:46:22","modified_gmt":"2024-05-25T05:46:22","slug":"pla","status":"publish","type":"post","link":"https:\/\/www.3dprint-italia.it\/WP\/2024\/03\/04\/pla\/","title":{"rendered":"IL PLA , molto di pi\u00f9 di un semplice filamento"},"content":{"rendered":"<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Oggi ho letto un articolo molto interessante che vorrei condividere con voi, se avete la pazienza di leggere lo<em>\u00a0sbrodolone<\/em>\u00a0di roba che segue\u00a0<span class=\"x3nfvp2 x1j61x8r x1fcty0u xdj266r xhhsvwb xat24cr xgzva0m xxymvpz xlup9mm x1kky2od\"><img loading=\"lazy\" decoding=\"async\" class=\"xz74otr\" src=\"https:\/\/static.xx.fbcdn.net\/images\/emoji.php\/v9\/t4c\/1\/16\/1f642.png\" alt=\"?\" width=\"16\" height=\"16\" \/><\/span><\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">LO SAPEVATE CHE IL PLA \u00e8 usato\u00a0<b>ANCHE<\/b>\u00a0per la stampa 3D ma il suo utilizzo principale \u00e8 in campo biomedicale e alimentare?<\/span><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Per la stampa 3D \u00e8 stato introdotto per il suo costo di preparazione molto ridotto rispetto ad altri polimeri, utilizzando gli stessi impianti che producono filamenti con polimeri di sintesi da petrolio. Oltre ad essere &#8220;green&#8221;&#8230;<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\">COME \u00c8 FATTO?<\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Il PLA \u00e8 un tipo di poliestere ottenuto da amido vegetale fermentato proveniente da polpa di mais, manioca, mais, canna da zucchero o barbabietola da zucchero. Lo zucchero contenuto in questi materiali rinnovabili viene fermentato e trasformato in acido lattico, che viene poi trasformato in acido polilattico o PLA.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\">A COSA SERVE?<\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Le propriet\u00e0 del materiale del PLA lo rendono adatto alla produzione di film plastici, flaconi e dispositivi medici biodegradabili, comprese viti, perni, piastre e aste progettati per biodegradarsi entro 6-12 mesi).<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Il PLA pu\u00f2 essere utilizzato come materiale termoretraibile poich\u00e9 si restringe sotto il calore. Questa facilit\u00e0 di fusione rende l\u2019acido polilattico adatto anche per applicazioni di stampa 3D.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Tuttavia, molti tipi di PLA hanno una bassa temperatura di transizione vetrosa (il famigerato molding o heat deflection o &#8220;zona clogging garantito&#8221;), il che li rende inadatti alla realizzazione di bicchieri di plastica progettati per contenere liquidi caldi.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\">\u00c8 ECOLOGICO?<\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">La produzione di PLA utilizza il 65% in meno di energia rispetto alla produzione di plastica convenzionale, genera il 68% in meno di gas serra (CO2 ad esempio) e non contiene tossine. Pu\u00f2 anche rimanere rispettoso dell&#8217;ambiente se si segue lo scenario corretto di fine vita.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Tuttavia,<b>\u00a0il tasso di degradazione \u00e8 molto lento a temperatura ambiente<\/b>, con uno studio del 2017 che mostra che non \u00e8 stata osservata alcuna degradazione in oltre un anno di immersione del materiale in acqua di mare a 25\u00b0C.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Tuttavia, il PLA pu\u00f2 essere degradato mediante idrolisi, degradazione termica o fotodegradazione:<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<ul class=\"x1e56ztr x1xmf6yo x1xfsgkm xtaz4m5\">\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Idrolisi: il peso molecolare viene ridotto scindendo i gruppi esterei della catena principale.<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Degradazione termica: questo processo porta alla comparsa di diversi composti, come oligomeri lineari e ciclici o molecole pi\u00f9 leggere con diversi lattidi e &#8230;<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Fotodegradazione: le radiazioni UV provocano il degrado, in particolare dove il PLA \u00e8 esposto alla luce solare.<\/span><\/div>\n<\/li>\n<\/ul>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Attualmente esistono quattro scenari comuni di fine vita del PLA:<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\">1.\u00a0<b>RICICLAGGIO<\/b><\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Questo \u00e8 chimico o meccanico. Il materiale di scarto pu\u00f2 contenere contaminanti, ma l&#8217;acido poliattico pu\u00f2 essere riciclato chimicamente utilizzando la depolimerizzazione termica o l&#8217;idrolisi per creare un monomero che pu\u00f2 poi essere trasformato in PLA vergine. Il PLA pu\u00f2 anche essere riciclato chimicamente utilizzando la transesterificazione per creare metil lattato.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\"><b>2. COMPOSTAGGIO<\/b><\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Le condizioni di compostaggio industriale consentono l\u2019idrolisi chimica seguita dalla digestione microbica per degradare il PLA.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\"><b>3. INCENERIMENTO<\/b><\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Il PLA a fine vita pu\u00f2 essere incenerito, senza lasciare residui (composti inorganici o microplastiche &#8211; solo CO2 e H2O).<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h5 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xyorhqc xtvhhri x1anpbxc\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen x1xlr1w8 xi81zsa\"><b>4. DISCARICA<\/b><\/span><\/h5>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Anche se il PLA pu\u00f2 essere smaltito in discarica, questa \u00e8 l&#8217;opzione meno rispettosa dell&#8217;ambiente, a causa del lento tasso di degradazione del materiale a temperatura ambiente.<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1sy10c2\">\n<blockquote class=\"xckqwgs x26u7qi x7g060r x1gslohp x11i5rnm xieb3on x1mh8g0r x1pi30zi x1swvt13\"><p><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xi81zsa\">VANTAGGI<\/span><\/span><\/p><\/blockquote>\n<\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Il PLA offre numerosi vantaggi rispetto ad altri materiali, tra cui:<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<ol class=\"x1e56ztr x1xmf6yo x1xfsgkm x3yw8vx\">\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Rispettoso dell&#8217;ambiente (<b>se smaltito correttamente<\/b>)<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Facile da stampare in 3D<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Sicuro per l&#8217;uso in applicazioni quali contenitori per alimenti e dispositivi medici<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Viene fornito con un&#8217;ampia gamma di opzioni composite e di colore per fornire propriet\u00e0 e aspetti diversi<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Pu\u00f2 essere saldato a solvente (come con diclorometano)<\/span><\/div>\n<\/li>\n<\/ol>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1sy10c2\">\n<blockquote class=\"xckqwgs x26u7qi x7g060r x1gslohp x11i5rnm xieb3on x1mh8g0r x1pi30zi x1swvt13\"><p><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xi81zsa\">SVANTAGGI<\/span><\/span><\/p><\/blockquote>\n<\/div>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Ci sono, tuttavia, alcuni svantaggi nell\u2019uso del PLA, tra cui:<\/span><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<ol class=\"x1e56ztr x1xmf6yo x1xfsgkm x3yw8vx\">\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Bassa resistenza al calore<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">Resistenza relativamente bassa<\/span><\/div>\n<\/li>\n<li>\n<div class=\"x1e56ztr\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x6prxxf xvq8zen xo1l8bm xzsf02u\">La lavorazione meccanica pu\u00f2 essere difficile<\/span><\/div>\n<\/li>\n<\/ol>\n<div class=\"x1e56ztr\"><\/div>\n<div class=\"x1e56ztr\"><\/div>\n<h4 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xod5an3 x14vqqas\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x1603h9y x1u7k74 xo1l8bm xzsf02u\"><b>VI \u00e9 PIACIUTO L&#8217;ARTICOLO?<\/b><\/span><\/h4>\n<h4 class=\"x1heor9g x1qlqyl8 x1pd3egz x1a2a7pz xod5an3 x14vqqas\"><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x1603h9y x1u7k74 xo1l8bm xzsf02u\"><b>Iscrivetevi ai nostri canali<\/b><\/span><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Oggi ho letto un articolo molto interessante che vorrei condividere<\/p>\n","protected":false},"author":4,"featured_media":214,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[15],"tags":[],"class_list":["post-106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materiali"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - 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