{"id":144142,"date":"2023-02-17T09:54:49","date_gmt":"2023-02-17T07:54:49","guid":{"rendered":"https:\/\/concentrol.com\/the-range-of-surfactants-for-high-resilience-polyurethane-foams\/"},"modified":"2023-11-08T19:30:30","modified_gmt":"2023-11-08T17:30:30","slug":"la-gamma-de-surfactants-per-a-escumes-de-poliureta-dalta-resiliencia","status":"publish","type":"post","link":"https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/ca\/la-gamma-de-surfactants-per-a-escumes-de-poliureta-dalta-resiliencia\/","title":{"rendered":"La gamma de surfactants per a escumes de poliuret\u00e0 d&#8217;alta resili\u00e8ncia"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text uncode_shortcode_id=\u00bb142266&#8243;]<span style=\"font-weight: 400;\">L&#8217;HR PU flexible, tamb\u00e9 conegut com a poliuret\u00e0 flexible, \u00e9s un material altament vers\u00e0til que s&#8217;ha convertit en una opci\u00f3 d&#8217;enginyeria cada cop m\u00e9s popular per a una varietat d&#8217;aplicacions industrials. S&#8217;ha utilitzat \u00e0mpliament a la ind\u00fastria del transport.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A m\u00e9s, el <\/span><b>poliuret\u00e0 d\u00b4alta resili\u00e8ncia<\/b><span style=\"font-weight: 400;\"> \u00e9s un material molt durador. Aix\u00f2 \u00e9s especialment important per a la fabricaci\u00f3 de productes que se sotmeten a un \u00fas intens, com ara el transport. Aix\u00f2 fa que el HR PU flexible sigui una opci\u00f3 excel\u00b7lent per als fabricants que busquen productes d&#8217;alta qualitat i durabilitat.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">El terme resili\u00e8ncia el podem trobar a diferents escumes de poliuret\u00e0. Als elast\u00f2mers, es defineix la resili\u00e8ncia com la relaci\u00f3 entre l&#8217;energia total subministrada per produir una deformaci\u00f3 i l&#8217;energia restitu\u00efda despr\u00e9s d&#8217;aquesta deformaci\u00f3. \u00c9s a dir, en termes generals, la resili\u00e8ncia \u00e9s el percentatge de recuperaci\u00f3 despr\u00e9s d\u2019una deformaci\u00f3 i aquesta dep\u00e8n de la velocitat de deformaci\u00f3.<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-144112 size-full\" src=\"https:\/\/concentrol.com\/wp-content\/uploads\/2023\/02\/iStock-1358599211.jpg\" alt=\"\" width=\"1000\" height=\"728\" srcset=\"https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/wp-content\/uploads\/2023\/02\/iStock-1358599211.jpg 1000w, https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/wp-content\/uploads\/2023\/02\/iStock-1358599211-300x218.jpg 300w, https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/wp-content\/uploads\/2023\/02\/iStock-1358599211-768x559.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Una <\/span><b>resili\u00e8ncia alta <\/b><span style=\"font-weight: 400;\">indica que un producte recupera completa i r\u00e0pidament la forma original, mentre que una resili\u00e8ncia baixa indica que un producte recupera parcialment i lentament la seva forma original. No obstant aix\u00f2, al sector del descans, el terme resili\u00e8ncia fa refer\u00e8ncia als materials que combinen propietats de flexibilitat, resist\u00e8ncia i amortiment. La resili\u00e8ncia \u00e9s una mesura amb qu\u00e8 se sol calibrar el confort que t\u00e9 un matal\u00e0s, a m\u00e9s resili\u00e8ncia, m\u00e9s comoditat.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Els <\/span><b>estabilitzadors de silicona<\/b><span style=\"font-weight: 400;\"> s\u00f3n una part rellevant en els processos de conformaci\u00f3 de l&#8217;HR PU flexible. Aquests estabilitzadors s&#8217;utilitzen per millorar el rendiment dels productes, alhora que se&#8217;n millora la durabilitat. Els estabilitzadors s\u00f3n una part essencial de la fabricaci\u00f3 de HR PU flexible, ja que ajuden a prevenir la degradaci\u00f3 dels materials, alhora que defineixen unes propietats o altres segons les necessitats del client. Els surfactants de silicona s\u00f3n copol\u00edmers formats per una base de silicona i poli\u00e8ters, generalment cadenes d&#8217;\u00f2xid de polietil\u00e8 i cadenes d&#8217;\u00f2xid de polipropil\u00e8. Els surfactants condicionen la formaci\u00f3 de c\u00e8l\u00b7lules fines, c\u00e8l\u00b7lules gruixudes, c\u00e8l\u00b7lules tancades i c\u00e8l\u00b7lules obertes, i aquestes estructures cel\u00b7lulars influeixen en les propietats finals de l&#8217;escuma de PU.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>Surfactants per a HR PU flexible<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Els surfactants de Concentrol de la gamma STB PU-12XX estan dissenyats per a escuma de PU d&#8217;alta resili\u00e8ncia, HR. Aquestes formulacions requereixen una estabilitzaci\u00f3 i regulaci\u00f3 de cel\u00b7les eficients, cosa que s&#8217;aconsegueix a trav\u00e9s de sistemes TDI, MDI o barreges de tots dos. Per tant, cal oferir una \u00e0mplia varietat d&#8217;additius per satisfer totes les necessitats. Aquests sistemes s\u00f3n estables i es busca una obertura d\u02bbescuma equilibrada.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Un dels requisits que se sol demanar \u00e9s una for\u00e7a de compressi\u00f3 baixa. Es pot assolir el nivell \u00f2ptim de compressi\u00f3 amb la selecci\u00f3 adequada de tensioactiu.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A causa de la legislaci\u00f3 cada cop m\u00e9s estricta de la ind\u00fastria de l&#8217;autom\u00f2bil i el matal\u00e0s, una de les prioritats \u00e9s reduir al m\u00ednim la contribuci\u00f3 d&#8217;emissions de compostos vol\u00e0tils. Aquestes emissions es divideixen en VOC (compostos org\u00e0nics vol\u00e0tils), FOG (compostos org\u00e0nics de \u201cfogging\u201d), VVOC (compostos org\u00e0nics molt vol\u00e0tils) i SVOC (compostos org\u00e0nics semi-vol\u00e0tils). A tall d&#8217;exemple, els VOC es desprenen f\u00e0cilment de l&#8217;escuma de PU quan el cotxe est\u00e0 tancat i la temperatura interna \u00e9s entre 25 \u00b0C i 90 \u00b0C. Els FOG s\u00f3n els VOC m\u00e9s els SVOC que s&#8217;evaporen a temperatures superiors a 90 \u00b0C.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">D&#8217;aquesta manera, els darrers anys Concentrol ha investigat la manera de reduir els VOC, FOG i aldehids dels surfactants de silicona amb una nova generaci\u00f3 de productes que permeten l&#8217;obtenci\u00f3 d&#8217;escumes de PU amb valors d&#8217;emissions relacionades amb els estabilitzants inferiors a 20ppm (per una dosi de 1pphp).<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>Els Ftalats<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Els ftalats s\u00f3n un grup de pl\u00e0stics sint\u00e8tics qu\u00edmics. Aquests compostos han rebut una mala acollida en els darrers anys, cosa que ha portat a la prohibici\u00f3 i eliminaci\u00f3 d&#8217;alguns d&#8217;ells als surfactants de silicona.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La normativa no restringeix l&#8217;\u00fas de tots els ftalats i alguns surfactants encara contenen aquests productes. A m\u00e9s, en alguns mercats hi ha requisits de baixa olor, atribu\u00efts principalment als compostos aldehids. Per aquestes raons, actualment hi ha tres tipus de productes dins de la l\u00ednia STB PU-12XX, encara que entre elles no hi ha difer\u00e8ncies de rendiment a l&#8217;escuma de PU:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">STB PU-12XX: Primera l\u00ednia dissenyada que porta compostos ftalats.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">STB PU-12XX PF: Segona l\u00ednia dissenyada lliure de ftalats per\u00f2 amb alt contingut d&#8217;aldehids i arom\u00e0tics, adre\u00e7ada al mercat europeu.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">STB PU-12XX PFJ: Tercera l\u00ednia dissenyada, lliure de ftalats amb baix contingut d&#8217;aldehids i arom\u00e0tics, dirigida al mercat asi\u00e0tic, la Xina i el Jap\u00f3 sobretot.<\/span><\/li>\n<\/ul>\n<p><b>Concentrol <\/b><span style=\"font-weight: 400;\">duu a terme una investigaci\u00f3 constant per desenvolupar surfactants per a HR PU flexible que satisfacin les necessitats dels seus clients i del mercat. Aquests productes ofereixen solucions innovadores per a aplicacions relacionades amb tota mena d&#8217;ind\u00fastria.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La investigaci\u00f3 permet, a m\u00e9s, oferir resposta a les noves normatives i desenvolupar productes per a mercats de tot el m\u00f3n.<\/span>[\/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%2F2023%2F02%2FCA_surfactantes_HRPUFLEXIBLE_compressed.pdf|target:_blank\u00bb uncode_shortcode_id=\u00bb210992&#8243;]Descarregar infografia[\/vc_button][vc_column_text uncode_shortcode_id=\u00bb180328&#8243;]<div class=\"wp-block-pdfemb-pdf-embedder-viewer\"><a href=\"https:\/\/concentrol.com\/wp-content\/uploads\/2023\/02\/CA_surfactantes_HRPUFLEXIBLE_compressed.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\" data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">CA_surfactantes_HRPUFLEXIBLE_compressed<\/a><\/div>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text uncode_shortcode_id=\u00bb142266&#8243;]L&#8217;HR PU flexible, tamb\u00e9 conegut com a poliuret\u00e0 flexible, \u00e9s un material altament vers\u00e0til que s&#8217;ha convertit en una [&hellip;]<\/p>\n","protected":false},"author":24,"featured_media":144113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[1020],"tags":[],"class_list":["post-144142","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pu-additives-ca"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La gamma de surfactants per a escumes de 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