{"id":107932,"date":"2019-12-05T17:58:45","date_gmt":"2019-12-05T15:58:45","guid":{"rendered":"http:\/\/concentrol.efimatica.com\/?p=107932"},"modified":"2025-07-31T11:47:33","modified_gmt":"2025-07-31T09:47:33","slug":"com-triar-un-desemmotllant-per-a-calcat","status":"publish","type":"post","link":"https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/ca\/com-triar-un-desemmotllant-per-a-calcat\/","title":{"rendered":"Com triar un desemmotllant per a cal\u00e7at"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column width=\u00bb1\/1&#8243;][vc_column_text]<em>Jornades Llatinoamericanes de Tecnologia del Cautx\u00fa<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>De l&#8217;11 al 15 de novembre es van celebrar a Quer\u00e9taro, M\u00e8xic, les XV Jornades Llatinoamericanes de Tecnologia del Cautx\u00fa. Es tracta d&#8217;una cita clau de trobada del m\u00f3n tecnol\u00f2gic, cient\u00edfic i acad\u00e8mic al voltant de la ind\u00fastria del cautx\u00fa. L&#8217;activitat est\u00e0 organitzada per la Societat Llatinoamericana de Tecnologia del Cautx\u00fa que compta actualment amb 4800 associats de 38 pa\u00efsos diferents.<\/p>\n<p>Concentrol va estar present a les jornades i va presentar la seva pon\u00e8ncia sobre l&#8217;elecci\u00f3 d&#8217;un agent desemmotllant per al cal\u00e7at. Durant l&#8217;explicaci\u00f3 es va detallar la manera com triar el desemmotllant m\u00e9s adequat per a cal\u00e7at de poliuret\u00e0 segons els diferents par\u00e0metres i factors que s&#8217;han de tenir en compte. Tamb\u00e9 es van exposar les tend\u00e8ncies actuals del mercat dels desemmotllants i es va presentar la companyia al costat de les seves refer\u00e8ncies per al cal\u00e7at de Phylon (modificaci\u00f3 de la goma EVA).[\/vc_column_text][vc_custom_heading]Import\u00e0ncia del desemmotllant[\/vc_custom_heading][vc_column_text]<\/p>\n<p>Els desemmotllants s\u00f3n una de les divisions estrat\u00e8giques de Concentrol i els desemmotllants per a soles de cal\u00e7at un dels productes estrella de l&#8217;empresa. La import\u00e0ncia d&#8217;aquest producte en el sector \u00e9s clau, ja que influeix de manera decisiva en l&#8217;aparen\u00e7a de les soles desemmotllades, en operacions com el pintat o pegat i en la rendibilitat mesurada en taxes de deixalla.<\/p>\n<p>L&#8217;objectiu d&#8217;aquest producte \u00e9s triple:<\/p>\n<ul>\n<li>Aconseguir un alt poder desemmotllant<\/li>\n<li>Aportar un bon acabat a la sola en termes de lluentor o mat<\/li>\n<li>Aportar uniformitat a la superf\u00edcie de la sola<\/li>\n<\/ul>\n<p>A m\u00e9s, un bon desemmotllant\u00a0 ha d&#8217;aconseguir un m\u00ednim embrutament del motlle i una gran adaptabilitat en les peces definides en el disseny del cal\u00e7at.[\/vc_column_text][vc_custom_heading]Factors determinants a valorar en l&#8217;elecci\u00f3 d&#8217;un desemmotllant[\/vc_custom_heading][vc_column_text]Els factors m\u00e9s importants a valorar durant el proc\u00e9s d&#8217;elecci\u00f3 d&#8217;un desemmotllant per a soles de sabata s\u00f3n:<\/p>\n<ul>\n<li><strong>Sistema de poliol: poli\u00e8ter\/poli\u00e8ster<\/strong><\/li>\n<\/ul>\n<p>Els poli\u00e8sters solen ser m\u00e9s barats i tenen menys viscositat, mentre que els poliols de poli\u00e8ter proporcionen millors propietats de resist\u00e8ncia a l&#8217;abrasi\u00f3, per\u00f2 tenen major viscositat i s\u00f3n m\u00e9s cars.<\/p>\n<p>Els desemmotllants estan dissenyats espec\u00edficament per a cada tipus de poliol.<\/p>\n<ul>\n<li><strong>Concentraci\u00f3 i material actiu<\/strong><\/li>\n<\/ul>\n<p>El desemmotllant \u00e9s un producte qu\u00edmic a base d&#8217;aigua o dissolvent segons la seva formulaci\u00f3; tot el seu material actiu i additius estan dispersats en dissolvents o emulsionats en aigua.<\/p>\n<p>La quantitat de mat\u00e8ria activa pot diferir, ja que podem tenir desemmotllants llestos per a usar, els de baix contingut de s\u00f2lids, generalment formulats amb un dissolvent d&#8217;evaporaci\u00f3 r\u00e0pida, com hept\u00e0, o desemmotllants concentrats llestos per a usar amb major contingut de s\u00f2lids per a poder aplicar menys cabal amb l&#8217;equip de polvoritzaci\u00f3, i generalment formulat amb un dissolvent menys vol\u00e0til, per exemple, nafta C9-C10, que tamb\u00e9 trigar\u00e0 m\u00e9s a assecar-se.<\/p>\n<ul>\n<li><strong>Temperatura del motlle<\/strong><\/li>\n<\/ul>\n<p>Les temperatures correctes del motlle s\u00f3n imprescindibles per a catalitzar la reacci\u00f3 entre el poliol i l&#8217;isocianat al nivell correcte a mesura que es formula el sistema, i per a obtenir soles de PU correctament curades en un temps de cicle definit per a no pertorbar els objectius de productivitat.<\/p>\n<ul>\n<li><strong>Acabat de la pe\u00e7a i processos posteriors (pintura o adher\u00e8ncia)<\/strong><\/li>\n<\/ul>\n<p>Depenent de si es desitja un acabat mat o brillant en superf\u00edcie triarem un desemmotllant o l&#8217;altre. Com a norma general, els desemmotllants formulats amb alta concentraci\u00f3 de ceres donen un acabat m\u00e9s setinat \/ mat que els que contenen nom\u00e9s una mescla de silicones i resines.<\/p>\n<p>Depenent del proc\u00e9s posterior a aplicar i si requerim una neteja i desgreixatge abans de pintar, existeixen algunes refer\u00e8ncies \u00f2ptimes per a facilitar i agilitar el proc\u00e9s.<\/p>\n<ul>\n<li><strong>Soles de bidensitat<\/strong><\/li>\n<\/ul>\n<p>En el cas concret de les soles de bidensitat, utilitzades en la ind\u00fastria del cal\u00e7at de seguretat, el desemmotllant ha de dissenyar-se en conseq\u00fc\u00e8ncia per a no interferir amb la uni\u00f3 de la sola PU i la sola interm\u00e8dia.<\/p>\n<p>Altres factors a considerar:<\/p>\n<ul>\n<li><strong>Seguretat i medi ambient<\/strong><\/li>\n<\/ul>\n<p>Nivell d&#8217;emissions VOC (compost org\u00e0nic vol\u00e0til). Aquestes emissions es consideren un dels contaminants m\u00e9s presents a l&#8217;atmosfera. Hi ha alguns desemmotllants que redueixen considerablement les emissions perjudicials per al medi ambient. Des de Concentrol som molt conscients dels inconvenients dels productes m\u00e9s perjudicials per a l&#8217;oz\u00f3 i estem treballant per optimitzar els resultats dels dissolvents base aigua (menys contaminants) per reduir l&#8217;\u00fas dels dissolvents base solvent (m\u00e9s contaminants).<\/p>\n<ul>\n<li><strong>Regulaci\u00f3 ATEX (atmosfera explosiva)<\/strong><\/li>\n<\/ul>\n<p>Durant l&#8217;\u00fas de desemmotllants, principalment de base dissolvent, tamb\u00e9 ha de considerar-se la regulaci\u00f3 ATEX (Atmosfera explosiva). Per evitar haver d&#8217;instal\u00b7lar instal\u00b7lacions ATEX, existeix la soluci\u00f3 d&#8217;usar desemmotllants a base d&#8217;aigua, encara que quan es parla de diferents graus d&#8217;inflamabilitat (coneguts en el llenguatge del sector com a Classe I, Classe II i Classe III), es poden implementar altres solucions com a desemmotllant de classe III concentrat, desemmotllant electroest\u00e0tic, pastes de cera\u2026<\/p>\n<ul>\n<li><strong>\u00das de robots d&#8217;aplicaci\u00f3<\/strong><\/li>\n<\/ul>\n<p>L&#8217;\u00fas d&#8217;aplicadors autom\u00e0tics estalvien costos alhora que asseguren l&#8217;aplicaci\u00f3 correcta.<\/p>\n<ul>\n<li><strong>Protecci\u00f3 al lloc de feina<\/strong><\/li>\n<\/ul>\n<p>Els compostos d&#8217;estany tenen riscos per a la salut de les persones. Per a evitar l&#8217;\u00fas d&#8217;aquestes subst\u00e0ncies restringides, ja s&#8217;ha est\u00e8s una nova variant de desemmotllants en l&#8217;\u00e0mbit mundial, els desemmotllants lliures d&#8217;estany. El seu control s&#8217;ha de realitzar d&#8217;acord amb els indicadors TLV i DNEL.<\/p>\n<p>La durada de les jornades i les exposicions als productes qu\u00edmics estan regulades per la Mitjana Ponderada en el Temps, que \u00e9s el valor l\u00edmit ambiental publicat per la ACGIH (American Conference of Governmental Industrial Hygienists); es defineixen com la \u00abconcentraci\u00f3 mitjana ponderada en el temps, per a una jornada laboral normal de treball de 8 hores i una setmana laboral de 40 hores, a la qual poden estar exposats gaireb\u00e9 tots els treballadors repetidament dia rere dia, sense efectes adversos\u00bb.<\/p>\n<p>DNEL: Derived No Effect Level (Nivell sense efecte derivat) \u00e9s el nivell d&#8217;exposici\u00f3 a una subst\u00e0ncia per sobre del qual els humans no han d&#8217;exposar-se. D&#8217;acord amb la legislaci\u00f3 REACH de la UE, els fabricants i importadors de subst\u00e0ncies qu\u00edmiques han de calcular els DNEL com a part de la seva avaluaci\u00f3 de seguretat qu\u00edmica (CSA) per a qualsevol producte qu\u00edmic utilitzat en quantitats de 10 tones o m\u00e9s per any.[\/vc_column_text][vc_custom_heading]Tend\u00e8ncies del mercat dels desemmotllants[\/vc_custom_heading][vc_column_text]<strong>Tipus de desemmotllants en tend\u00e8ncia<\/strong><\/p>\n<ul>\n<li><strong>Desemmotllants electroest\u00e0tics<\/strong><\/li>\n<\/ul>\n<p>Per alguns dels seus avantatges, ha de considerar-se l&#8217;aplicaci\u00f3 electroest\u00e0tica, que funciona juntament amb desemmotllants electroest\u00e0tics. Qualsevol desemmotllant a base de dissolvent pot convertir-se en electroest\u00e0tic i en aquests casos l&#8217;aplicaci\u00f3 consisteix en el fet que el motlle atreu el desemmotllant evitant p\u00e8rdues de producte. Els desemmotllants electroest\u00e0tics redueixen significativament el consum i redueix els VOC emesos, millorant l&#8217;ambient de treball. Un altre avantatge dels desemmotllants electroest\u00e0tics \u00e9s que es controla la seva aplicaci\u00f3 amb major facilitat.<\/p>\n<ul>\n<li><strong>Desemmotllants h\u00edbrids<\/strong><\/li>\n<\/ul>\n<p>Els desemmotllants cosolvents estan produ\u00efts amb meitat aigua i meitat dissolvent. S\u00f3n una bona soluci\u00f3 interm\u00e8dia per als fabricants de cal\u00e7at que actualment produeixen les seves soles amb un desemmotllant a base de dissolvents i no volen fer el pas per a canviar a l&#8217;aigua a causa dels inconvenients i els canvis en la manera de treballar que comporta. El canvi de base dissolvent a h\u00edbrid suposa una millora en certs aspectes, com la reducci\u00f3 de preus, la reducci\u00f3 de VOC emesos a l&#8217;atmosfera i un millor ambient de treball en la l\u00ednia de producci\u00f3.<\/p>\n<ul>\n<li><strong>Desemmotllants base aigua<\/strong><\/li>\n<\/ul>\n<p>Fa molts anys que existeixen aquest tipus de dissolvents per\u00f2 fins al moment no s&#8217;havien pogut optimitzar els seus resultats i molts fabricants no els triaven pels seus desavantatges, com per exemple aportar un acabat greix\u00f3s a la pe\u00e7a de poliuret\u00e0 desemmotllada. Millorar els seus resultats \u00e9s el principal repte del sector, i des de Concentrol estem aconseguint millores molt significatives en el sector dels desemmotllants basi aigua que ens fan pensar que en els pr\u00f2xims anys veurem una clara tend\u00e8ncia al canvi sense retic\u00e8ncies dels fabricants.<\/p>\n<ul>\n<li><strong>Desemmotllants per a phylon<\/strong><\/li>\n<\/ul>\n<p>La tend\u00e8ncia de les soles fabricades amb escumes EVA. El proc\u00e9s de comprensi\u00f3 en calenta d&#8217;escuma d&#8217;EVA, d\u00f3na com a resultat el phylon, material que actualment est\u00e0 en expansi\u00f3. Aquest material \u00e9s menys dens i m\u00e9s lleuger. El phylon \u00e9s el proc\u00e9s m\u00e9s com\u00fa per a crear soles per a sabates esportives.<\/p>\n<p>L&#8217;extracci\u00f3 de la pe\u00e7a de phylon \u00e9s realitzada gr\u00e0cies a la pres\u00e8ncia d&#8217;un agent desemmotllant. Aquest agent \u00e9s aplicat mitjan\u00e7ant pistola aerogr\u00e0fica o pinzell, proporcionant la lubricaci\u00f3 necess\u00e0ria per a poder extreure la pe\u00e7a sense causar danys superficials. A m\u00e9s, aquests productes s\u00f3n els responsables de l&#8217;aspecte i el tacte superficial de la pe\u00e7a desemmotllada.<\/p>\n<p>Es treballa amb temperatures molt altes, llavors un desemmotllant base aigua permet refredar el motlle per al posterior desemmotllament de la pe\u00e7a.<\/p>\n<p>Des de Concentrol oferim una \u00e0mplia varietat de desemmotllants i els fabriquem a mesura segons les necessitats dels nostres clients. Depenent de les necessitats de cada proc\u00e9s de producci\u00f3 ser\u00e0 millor una refer\u00e8ncia o l&#8217;altra, i ning\u00fa millor que nosaltres coneix la millor soluci\u00f3 per a cada cas. \u00c9s important con\u00e8ixer b\u00e9 els aspectes a tenir en compte per a l&#8217;elecci\u00f3 de la mena de desemmotllant i triar el producte m\u00e9s adequat a les nostres necessitats.<\/p>\n<p>Concentrol tamb\u00e9 ofereix estabilitzants de silicona que milloren l&#8217;estabilitzaci\u00f3 de l&#8217;escuma durant la seva formaci\u00f3; netejadors de motlles, des dels m\u00e9s t\u00f2xics per\u00f2 efectius que contenen NMP i NEP fins a netejadors sense risc per a la salut i lliures de NMP. Finalment, tamb\u00e9 tenim adhesius indicats per a l&#8217;adhesi\u00f3 de tota mena de teixits i pells en operacions pr\u00e8vies a la costura.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00bb1\/1&#8243;][vc_button button_color=\u00bbcolor-631299&#8243; border_width=\u00bb0&#8243; link=\u00bburl:http%3A%2F%2Fconcentrol.com%2Fwp-content%2Fuploads%2F2020%2F01%2FCAT_DSM_SectorCalzadoMex_info-1.pdf||target:%20_blank|\u00bb]DESCARREGAR INFOGR\u00c0FIC[\/vc_button][\/vc_column][\/vc_row]<\/p>\n<p>&nbsp;<\/p>\n<div class=\"wp-block-pdfemb-pdf-embedder-viewer\"><a href=\"https:\/\/concentrol.com\/wp-content\/uploads\/2020\/01\/CAT_DSM_SectorCalzadoMex_info-1.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\" data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">CAT_DSM_SectorCalzadoMex_info (1)<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column width=\u00bb1\/1&#8243;][vc_column_text]Jornades Llatinoamericanes de Tecnologia del Cautx\u00fa &nbsp; De l&#8217;11 al 15 de novembre es van celebrar a Quer\u00e9taro, M\u00e8xic, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":107933,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[127],"tags":[135],"class_list":["post-107932","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-desemmotllantsrb","tag-calcat"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Com triar un desemmotllant per a cal\u00e7at<\/title>\n<meta name=\"description\" content=\"Concentrol - Chemical Solutions\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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