{"id":129112,"date":"2021-04-14T13:10:08","date_gmt":"2021-04-14T11:10:08","guid":{"rendered":"https:\/\/concentrol.com\/release-agents-for-moulded-polyurethane-notions-possibilities-study-and-product-adaptation\/"},"modified":"2021-04-14T13:19:32","modified_gmt":"2021-04-14T11:19:32","slug":"desemmotllants-per-poliureta-emmotllat-nocions-possibilitats-estudi-i-adaptacio-de-producte","status":"publish","type":"post","link":"https:\/\/concentrol.com\/ca\/desemmotllants-per-poliureta-emmotllat-nocions-possibilitats-estudi-i-adaptacio-de-producte\/","title":{"rendered":"DESEMMOTLLANTS PER POLIURET\u00c0 EMMOTLLAT: NOCIONS, POSSIBILITATS, ESTUDI I ADAPTACI\u00d3 DE PRODUCTE"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<span style=\"font-weight: 400;\">Quan es parla de poliuret\u00e0 emmotllat es pensa sempre, en primera inst\u00e0ncia i com a imprescindibles, en isocianats i els seus pre-pol\u00edmers, poliols \u00e8ter o \u00e8ster, motlles, injectors d&#8217;alta o baixa pressi\u00f3, formulacions de poliol, amines, sals met\u00e0l\u00b7liques, gasificants, etc. De l&#8217;\u00fas de <\/span><b>desemmotllants<\/b><span style=\"font-weight: 400;\"> es parla poc, fins que s&#8217;inicien els assajos en la posada en marxa dels projectes de modelatge.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">El desemmotllant no \u00e9s que sigui necessari, sin\u00f3 que <\/span><b>\u00e9s imprescindible<\/b><span style=\"font-weight: 400;\">, ja que no es pot modelar poliuret\u00e0 sense el seu \u00fas. No solament desemmotlla, com el seu nom indica, sin\u00f3 que<\/span><b> interacciona amb el poliuret\u00e0 en major o menor grau<\/b><span style=\"font-weight: 400;\">, per b\u00e9 o per mal.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Cal tenir en compte l&#8217;alt poder d&#8217;adhesi\u00f3 que implica un poliuret\u00e0, dit d&#8217;una altra manera, sense desemmotllant o es parteix la pe\u00e7a adherida a ambdues parts del motlle, fons i tapa, o no es pot obrir el motlle&#8230;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Realment aquesta manca de protagonisme dels desemmotllants es deu al desconeixement dels avantatges o problem\u00e0tiques que poden esdevenir, depenent del desemmotllant que es tri\u00ef per a un nou projecte.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u00e0sicament, la formulaci\u00f3 que es comenta que t\u00e9 un desemmotllant \u00e9s una cosa similar a: \u00abcera dissolta en solvent\u00bb o \u00abcera a l&#8217;aigua\u00bb, amb esment a la silicona en alguns casos; i poca cosa m\u00e9s. Una cosa aix\u00ed com considerar que el poliuret\u00e0 sempre \u00e9s el mateix \u00abisocianat i poliol\u00bb. No \u00e9s que vagin desencaminats, per\u00f2 en tots dos casos \u00e9s m\u00e9s complex.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Podem considerar que el desemmotllant es retroalimenta de les formulacions de poliuret\u00e0 cada vegada m\u00e9s sensibles, sent la seva tasca m\u00e9s complexa com tamb\u00e9 les peces modelades.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Realment quan s&#8217;inicien les pre-s\u00e8ries, comencen tots els involucrats en el desemmotllament, operaris i t\u00e8cnics, a veure la influ\u00e8ncia i import\u00e0ncia que t\u00e9 el desemmotllant <\/span><b>en l&#8217;aspecte de la pe\u00e7a produ\u00efda, en el rebuig i reparaci\u00f3 de peces, i en general en tot el que dep\u00e8n de la superf\u00edcie desemmotllada<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sobre la superf\u00edcie de la pe\u00e7a s&#8217;actua, quant a formaci\u00f3 i caracter\u00edstiques, tamb\u00e9 des de la formulaci\u00f3, per\u00f2 podem considerar que les propietats superficials depenen d&#8217;aquesta i del que podr\u00edem denominar com \u00abinteracci\u00f3 amb el desemmotllant\u00bb.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">De vegades per a b\u00e9 i altres per a no tan b\u00e9, el desemmotllant \u00e9s en gran part responsable de l&#8217;aspecte i propietats de les peces, en tota mena d&#8217;escumes de PUR o en PUR compacte sense cel\u00b7la interna.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Entre les <\/span><b>propietats<\/b><span style=\"font-weight: 400;\"> que podem esmentar en qu\u00e8 el desemmotllant es veu involucrat, podem enumerar les seg\u00fcents com a exemple (i no com totes les possibles):<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Seients i respatllers, reposacaps<\/b><span style=\"font-weight: 400;\">: ha de conferir a la superf\u00edcie un efecte suavitzant &#8211; lliscant per facilitar l&#8217;enfundat i posterior muntatge. Porus obert per poder trencar la c\u00e8l\u00b7lula.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Insonoritzants per a autom\u00f2bil<\/b><span style=\"font-weight: 400;\">: porus obert per absorbir el soroll a l&#8217;interior de l&#8217;escuma.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Espuma flexible HR en general<\/b><span style=\"font-weight: 400;\">: evitar l&#8217;aparici\u00f3 de bombolles per defecte d&#8217;assecat o exc\u00e9s de temperatura, ambdues possiblement degudes al desemmotllant, si b\u00e9 la formulaci\u00f3 dels components ho poden tamb\u00e9 ocasionar.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>En espuma flexible de pell integral:<\/b><span style=\"font-weight: 400;\"> acabat de la pe\u00e7a a vista, sense fluxos de material o arrossegaments, acabat m\u00e9s o menys brillant depenent dels requeriments de les peces. Sense cap defecte superficial apreciable, igualtat total en superf\u00edcie.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Altres propietats on el desemmotllant i els components poden influir<\/b><span style=\"font-weight: 400;\">: tacte (suau &#8211; aspre), soroll (del seient muntat), pell imitaci\u00f3 acabat bossa de pl\u00e0stic (espuma r\u00edgida, proc\u00e9s continu o discontinu, per a la producci\u00f3 de panells sandvitx destinats a l&#8217;a\u00efllament t\u00e8rmic), lliscant, antilliscant, impermeable (peces de flexible densificat), adhesivable (aplicat a napes calefactores, sensors de moviment, el residu del desemmotllant sobre la pe\u00e7a ha de permetre enganxar un autoadhesiu), etc.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Sense oblidar les caracter\u00edstiques <\/span><b>fisicoqu\u00edmiques<\/b><span style=\"font-weight: 400;\"> que els diferencien, entre d&#8217;altres.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Base dissolvent inflamable o combustible, per\u00f2 sempre ATEX.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Combinacions d&#8217;aigua i dissolvent com a vehicle en formulacions d&#8217;h\u00edbrids 50:50 fins a 70:30 (aigua: solvent), co-solvents amb participaci\u00f3 de dissolvent &lt;10% i els base aigua 100%.<\/span><\/li>\n<\/ul>\n<p><b>Sistemes d&#8217;aplicaci\u00f3 diversos<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Equips de polvoritzaci\u00f3 sistema air-mix, air-less, aerogr\u00e0fics, electrost\u00e0tics i poden ser robotitzats o no.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Si a tot aix\u00f2 sumem els <\/span><b>possibles riscos<\/b><span style=\"font-weight: 400;\"> per inflamabilitat, toxicitat, COV (emissi\u00f3 de compostos org\u00e0nics vol\u00e0tils), transport, emmagatzematge, estabilitat i robustesa del producte; i tenim en compte <\/span><b>par\u00e0metres addicionals<\/b><span style=\"font-weight: 400;\"> com la brut\u00edcia dels motlles en anar treballant, la neteja adequada per a cada tipus de residu que queda en el motlle, possibles al\u00b7l\u00e8rgies segons materials emprats i sensibilitat dels operaris, i aplicacions en qu\u00e8 es requereixi contacte alimentari, podem afirmar que els desemmotllants s\u00f3n productes complexos per la multitud de possibilitats que es disposa a l&#8217;hora de formular-los, i la multitud de propietats que s&#8217;esperen d&#8217;ells<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tenint en compte tots aquests par\u00e0metres, i el sistema de treball de cada client, <\/span><b>Concentrol adapta el desemmotllant \u00f2ptim per a cada l\u00ednia<\/b><span style=\"font-weight: 400;\">, mitjan\u00e7ant un disseny de formulacions que cobreixin totes les seves necessitats.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">El nostre equip format per responsables Comercials i T\u00e8cnics, a m\u00e9s de T\u00e8cnics d&#8217;Aplicaci\u00f3 amb molta experi\u00e8ncia acumulada a peu de l\u00ednia, s\u00f3n la millor garantia d&#8217;\u00e8xit en la <\/span><b>implantaci\u00f3 i optimitzaci\u00f3 de desemmotllants a mida per escuma de poliuret\u00e0<\/b><span style=\"font-weight: 400;\">, per a qualsevol client que ho necessiti.<\/span><\/p>\n<p><em><strong>Autor: Joaquim Serra, Director T\u00e8cnic.<\/strong><\/em>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00bb1\/1&#8243;][vc_button border_width=\u00bb0&#8243; link=\u00bburl:https%3A%2F%2Fconcentrol.com%2Fwp-content%2Fuploads%2F2021%2F04%2FCA_DESMOLDEANTES.pdf|target:_blank\u00bb]Descarregar infogr\u00e0fic[\/vc_button][vc_column_text]<div class=\"wp-block-pdfemb-pdf-embedder-viewer\"><a href=\"https:\/\/concentrol.com\/wp-content\/uploads\/2021\/04\/CA_DESMOLDEANTES.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\" data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">CA_DESMOLDEANTES<\/a><\/div>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text]Quan es parla de poliuret\u00e0 emmotllat es pensa sempre, en primera inst\u00e0ncia i com a imprescindibles, en isocianats i els [&hellip;]<\/p>\n","protected":false},"author":24,"featured_media":129086,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[127],"tags":[137],"class_list":["post-129112","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-desemmotllantsrb","tag-automocio"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DESEMMOTLLANTS PER POLIURET\u00c0 EMMOTLLAT: NOCIONS, 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