{"id":27679,"date":"2025-11-11T09:29:35","date_gmt":"2025-11-11T01:29:35","guid":{"rendered":"https:\/\/xjysilicone.com\/?p=27679"},"modified":"2025-11-11T09:29:47","modified_gmt":"2025-11-11T01:29:47","slug":"what-are-the-bonding-properties-of-silicone-psa","status":"publish","type":"post","link":"https:\/\/www.xjysilicone.com\/pt\/what-are-the-bonding-properties-of-silicone-psa.html","title":{"rendered":"Quais s\u00e3o as propriedades de ades\u00e3o do adesivo sens\u00edvel \u00e0 press\u00e3o de silicone?"},"content":{"rendered":"<div class=\"blog-posts single-post\" style=\"border-bottom: 2px solid #00999a;\" uia-uid=\"0|1\">\n<article class=\"post post-large blog-single-post border-0 m-0 p-0\">\n<div class=\"post-content ml-0\">\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">As aplica\u00e7\u00f5es de adesivos sens\u00edveis \u00e0 press\u00e3o continuam a se expandir, a demanda do mercado continua a crescer, e a conscientiza\u00e7\u00e3o ambiental e as pol\u00edticas de desenvolvimento sustent\u00e1vel para promover a demanda de mercado dos produtos de PSA de silicone tamb\u00e9m aumentaram gradualmente. Quais s\u00e3o as propriedades de ades\u00e3o do PSA de silicone?<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><b><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">PSA de silicone geralmente se refere a adesivos sens\u00edveis \u00e0 press\u00e3o \u00e0 base de pol\u00edmeros de silicone, ou adesivos sens\u00edveis \u00e0 press\u00e3o \u00e0 base de acr\u00edlico modificado com silicone e borracha, esses materiais de baixa energia superficial. Eles s\u00e3o superiores aos adesivos sens\u00edveis \u00e0 press\u00e3o tradicionais \u00e0 base de acr\u00edlico e borracha em termos de desempenho, com boa resist\u00eancia a produtos qu\u00edmicos, \u00e1gua, \u00f3leo, solventes, altas e baixas temperaturas, degrada\u00e7\u00e3o t\u00e9rmica e degrada\u00e7\u00e3o oxidativa. Essas caracter\u00edsticas permitem que o adesivo sens\u00edvel \u00e0 press\u00e3o de silicone adira com sucesso a uma variedade de materiais dif\u00edceis de aderir, incluindo poliolefinas n\u00e3o tratadas (como substratos de baixa energia superficial, como PET, PE), pl\u00e1sticos fluorados, poliimida e policarbonato.<\/font><\/span><\/span><\/span><\/b><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">As cinco vantagens e aplica\u00e7\u00f5es seguintes do adesivo sens\u00edvel \u00e0 press\u00e3o de silicone:<a id=\"1\" name=\"1\"><\/a><\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li style=\"text-align: justify;\"><a href=\"#1\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">O que \u00e9 PSA?<\/font><\/span><\/span><\/span><\/span><\/span><\/a><\/li>\n<li style=\"text-align: justify;\"><a href=\"#2\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">Quais s\u00e3o os componentes da fita de PSA?<\/font><\/span><\/span><\/span><\/span><\/span><\/a><\/li>\n<li style=\"text-align: justify;\"><a href=\"#3\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">O que afeta o desempenho do PSA?<\/font><\/span><\/span><\/span><\/span><\/span><\/a><\/li>\n<li style=\"text-align: justify;\"><a href=\"#4\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">Qual \u00e9 o mecanismo de ades\u00e3o do PSA de silicone?<\/font><\/span><\/span><\/span><\/span><\/span><\/a><\/li>\n<li style=\"text-align: justify;\"><a href=\"#5\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">Como melhorar o desempenho do PSA?<\/font><\/span><\/span><\/span><\/span><\/span><\/a><\/li>\n<\/ul>\n<h2 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"1_What_is_PSA\"><\/span><span style=\"font-size:22px;\"><span style=\"color:#000000;\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">1. O que \u00e9 PSA?<\/font><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">A fita adesiva \u00e9 um tipo especial de adesivo, esse adesivo \u00e9 aplicado no substrato processado em uma tira e fornecido em rolos, incluindo fita adesiva ativada por solvente, fita adesiva do tipo aquecimento e fita adesiva sens\u00edvel \u00e0 press\u00e3o. Por exemplo, h\u00e1 o uso m\u00e9dico di\u00e1rio de emplastros de borracha e isolamento el\u00e9trico que pertencem \u00e0 fita de PSA.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">Os principais componentes do adesivo sens\u00edvel \u00e0 press\u00e3o incluem tipos de borracha e resina, como poliacrilato ou poli(\u00e9ter vin\u00edlico) dois tipos, o substrato requer uniformidade, baixa expans\u00e3o e boa molhabilidade por solvente, incluindo:<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(1) Tecidos como algod\u00e3o, tecido de vidro ou tecido n\u00e3o tecido.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(2) Filmes pl\u00e1sticos como PE, PP, PVC e filme de poli\u00e9ster.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(3) Papel como papel kraft, papel transparente de vidro, etc., a espessura original do substrato entre 0,1-0,5 mm.<a id=\"2\" name=\"2\"><\/a><\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"\/media\/145\/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20241019092745.png\" style=\"width: 265px; height: 250px;\"><\/p>\n<h2 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"2_What_are_the_components_of_pressure-sensitive_adhesive_tape\"><\/span><span style=\"font-size:22px;\"><span style=\"color:#000000;\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">2. Quais s\u00e3o os componentes da fita adesiva sens\u00edvel \u00e0 press\u00e3o?<\/font><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"\u5b8b\u4f53\">\u2460 <\/font><font face=\"Open Sans\">Adesivo sens\u00edvel \u00e0 press\u00e3o<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"\u5b8b\u4f53\">\u2461 <\/font><font face=\"Open Sans\">Material do substrato<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"\u5b8b\u4f53\">\u2462 <\/font><font face=\"Open Sans\">Agente de tratamento do substrato<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">A fun\u00e7\u00e3o do primer \u00e9 aumentar a for\u00e7a de ades\u00e3o entre o adesivo e o substrato, para que ao remover a fita n\u00e3o leve ao descolamento do adesivo e do substrato e manche a superf\u00edcie a ser aderida, e para que a fita tenha reutilizabilidade. O primer comumente utilizado \u00e9 borracha de cloropreno parcialmente vulcanizada com isocianato, borracha clorada modificada.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"\u5b8b\u4f53\">\u2463 <\/font><font face=\"Open Sans\">Agente de tratamento do verso<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">O verso do agente de tratamento geralmente \u00e9 feito de poliacrilato, PVC e outros materiais formulados. Pode desempenhar o papel de um agente isolante. A fita adesiva dupla face deve adicionar uma camada de papel de isolamento, como filme de PVC semi-r\u00edgido, filme de PP ou papel kraft.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"\u5b8b\u4f53\">\u2464 <\/font><font face=\"Open Sans\">Papel isolante<a id=\"3\" name=\"3\"><\/a><\/font> <\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"\/media\/145\/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20241019092915.png\" style=\"width: 254px; height: 250px;\"><\/p>\n<h2 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"3_What_affects_the_performance_of_PSA\"><\/span><span style=\"font-size:22px;\"><span style=\"color:#000000;\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">3. O que afeta o desempenho do PSA?<\/font><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"31_Material_composition\"><\/span><span style=\"color:#000000;\"><span style=\"font-size:13.5pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">3.1 Composi\u00e7\u00e3o do material<\/font><\/span><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">O adesivo sens\u00edvel \u00e0 press\u00e3o n\u00e3o precisa ser aquecido, podendo ser unido com press\u00e3o dos dedos, sendo um adesivo resistente ao descolamento. O desempenho do adesivo sens\u00edvel \u00e0 press\u00e3o varia dependendo da composi\u00e7\u00e3o.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(1) O adesivo sens\u00edvel \u00e0 press\u00e3o \u00e0 base de borracha utiliza principalmente borracha natural como mat\u00e9ria-prima principal. Devido \u00e0 alta massa molecular relativa, baixa temperatura de transi\u00e7\u00e3o v\u00edtrea e boa compatibilidade com a resina de ades\u00e3o, o adesivo resultante apresenta excelente for\u00e7a de reten\u00e7\u00e3o, bom desempenho em baixas temperaturas, e melhor ades\u00e3o r\u00e1pida e final. A principal desvantagem \u00e9 a baixa resist\u00eancia ao envelhecimento.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(2) O adesivo sens\u00edvel \u00e0 press\u00e3o de acrilato \u00e9 produzido principalmente pela copolimeriza\u00e7\u00e3o de mon\u00f4meros acr\u00edlicos, apresentando boa transpar\u00eancia, for\u00e7a de coes\u00e3o e propriedades adesivas, especialmente para superf\u00edcies adesivas polares e superf\u00edcies porosas. Al\u00e9m disso, possui excelente resist\u00eancia ao envelhecimento.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(3) O adesivo sens\u00edvel \u00e0 press\u00e3o de elast\u00f4mero termopl\u00e1stico \u00e9 composto principalmente por elast\u00f4meros \u00e0 base de estireno SIS e SBS, sendo fabricado como adesivo sens\u00edvel \u00e0 press\u00e3o solvente com baixa viscosidade, alta resist\u00eancia de coes\u00e3o e for\u00e7a de descolamento. Devido \u00e0 presen\u00e7a de duplas liga\u00e7\u00f5es na estrutura molecular, n\u00e3o possui boa resist\u00eancia ao envelhecimento, mas essa resist\u00eancia melhora significativamente ap\u00f3s a oxida\u00e7\u00e3o.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(4) O adesivo sens\u00edvel \u00e0 press\u00e3o de silicone tem como principais componentes borracha de silicone e resina de silicone, apresentando excelente resist\u00eancia a altas e baixas temperaturas, e boas propriedades adesivas para poliolefinas e pol\u00edmeros fluorados. Na formula\u00e7\u00e3o do adesivo sens\u00edvel \u00e0 press\u00e3o, pigmentos e cargas podem ser adicionados para obter adesivos coloridos, como a adi\u00e7\u00e3o de di\u00f3xido de tit\u00e2nio para produzir adesivo sens\u00edvel \u00e0 press\u00e3o branco.<\/font> <\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"\/media\/145\/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20241019092859.png\" style=\"width: 261px; height: 250px;\"><\/p>\n<h3 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"32_Relative_molecular_mass\"><\/span><span style=\"color:#000000;\"><span style=\"font-size:13.5pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><span style=\"font-style:normal\"><font face=\"Open Sans\">3.2 Massa molecular relativa<\/font><\/span><\/span><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">A massa molecular relativa e sua distribui\u00e7\u00e3o t\u00eam um grande impacto nas diversas propriedades do adesivo sens\u00edvel \u00e0 press\u00e3o. A redu\u00e7\u00e3o da massa molecular relativa pode diminuir a viscosidade do adesivo, facilitando a umecta\u00e7\u00e3o da superf\u00edcie do material a ser colado e melhorando a ades\u00e3o interfacial. <\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">No entanto, quando a massa molecular relativa \u00e9 muito baixa, a resist\u00eancia de coes\u00e3o \u00e9 reduzida, e a camada adesiva pode sofrer danos coesivos durante o descolamento. Aumentar a massa molecular relativa pode melhorar a coes\u00e3o, mas uma massa molecular relativa excessivamente alta pode prejudicar a dispers\u00e3o e a umecta\u00e7\u00e3o. Portanto, a massa molecular relativa do adesivo sens\u00edvel \u00e0 press\u00e3o deve estar dentro de uma faixa espec\u00edfica para obter boas propriedades adesivas. A distribui\u00e7\u00e3o da massa molecular relativa tamb\u00e9m tem um impacto significativo; geralmente, adesivos com distribui\u00e7\u00e3o mais ampla apresentam melhores propriedades adesivas.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<h3 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"33_Glass_transition_temperature\"><\/span><span style=\"color:#000000;\"><span style=\"font-size:13.5pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">3.3 Temperatura de transi\u00e7\u00e3o v\u00edtrea<\/font><\/span><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">A temperatura de transi\u00e7\u00e3o v\u00edtrea Tg tem um grande impacto no desempenho do adesivo sens\u00edvel \u00e0 press\u00e3o. Diferentes valores de Tg afetam a viscosidade do adesivo \u00e0 temperatura ambiente e seu m\u00f3dulo de elasticidade. \u00c0 medida que o m\u00f3dulo de elasticidade aumenta, a for\u00e7a de descolamento diminui, podendo comprometer a sensibilidade \u00e0 press\u00e3o. Se o Tg for muito baixo, a resist\u00eancia de coes\u00e3o ser\u00e1 reduzida, favorecendo danos durante o descolamento. Portanto, o Tg do adesivo sens\u00edvel \u00e0 press\u00e3o deve ser mantido em uma faixa espec\u00edfica, geralmente entre -20 \u00b0C e 60 \u00b0C.<a id=\"4\" name=\"4\"><\/a><\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"\/media\/145\/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20241019092915_20241019092916.png\" style=\"width: 254px; height: 250px;\"><\/p>\n<h2 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"4_Silicone_PSAS_bonding_mechanism\"><\/span><span style=\"font-size:22px;\"><span style=\"color:#000000;\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">4. Qual \u00e9 o mecanismo de uni\u00e3o dos PSAs de silicone?<\/font><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(1) <\/font><\/span><\/span><\/span><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">I<\/font><\/span><\/span><\/span><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">Sob press\u00e3o adequada, o adesivo sens\u00edvel \u00e0 press\u00e3o de silicone apresentar\u00e1 caracter\u00edsticas de fluxo viscoso quase l\u00edquido. Esse fluxo permite que o adesivo entre em contato pr\u00f3ximo e penetre nos microporos e sulcos da superf\u00edcie do material a ser colado, aumentando a \u00e1rea de contato efetiva entre o adesivo e o substrato, resultando em uma for\u00e7a adesiva duradoura.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(2) Quando produtos com adesivo sens\u00edvel \u00e0 press\u00e3o de silicone precisam ser descolados, suas propriedades el\u00e1sticas resistem a for\u00e7as externas, especialmente em casos de descolamento em alta velocidade, mantendo uma for\u00e7a de descolamento elevada.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">(3) A capacidade de umecta\u00e7\u00e3o do adesivo sens\u00edvel \u00e0 press\u00e3o de silicone na superf\u00edcie do material tamb\u00e9m \u00e9 fundamental. Uma boa umectabilidade permite que o adesivo entre em contato \u00edntimo com a superf\u00edcie do substrato em n\u00edvel molecular, criando uma forte ades\u00e3o interfacial por meio de for\u00e7as intermoleculares.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<h3 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"XJY-301_Silicone_pressure-sensitive_adhesives\"><\/span><a href=\"https:\/\/www.xjysilicone.com\/pt\/query\/product\/?query=301\"><span style=\"font-size:13.5pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">Adesivos sens\u00edveis \u00e0 press\u00e3o de silicone XJY-301<\/font><\/span><\/span><\/span><\/b><\/span><\/span><\/span><\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">\u00c9 fabricado a partir da estrutura espec\u00edfica da resina de silicone e do polidimetilsiloxano de alto peso molecular em conjunto com adesivo org\u00e2nico, adequado para condi\u00e7\u00f5es espec\u00edficas de cen\u00e1rio.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">Em compara\u00e7\u00e3o com a borracha natural, o adesivo sens\u00edvel \u00e0 press\u00e3o de silicone apresenta caracter\u00edsticas como resist\u00eancia ao calor, alta estabilidade, boa isola\u00e7\u00e3o el\u00e9trica, transpar\u00eancia, alta for\u00e7a de descolamento e resist\u00eancia a produtos qu\u00edmicos. Possui uma ampla variedade de aplica\u00e7\u00f5es em processamento industrial, processamento eletr\u00f4nico, materiais \u00f3pticos, cuidados de sa\u00fade, fitas de mica, fitas de emenda, filmes protetores e outros campos.<a id=\"5\" name=\"5\"><\/a><\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"\/media\/145\/XJY-301_2.png\" style=\"height: 293px; width: 800px;\"><\/p>\n<h2 style=\"margin-top:7px; margin-bottom:7px; text-align:left\"><span class=\"ez-toc-section\" id=\"5_How_to_make_better_performance_of_pressure-sensitive_adhesive\"><\/span><span style=\"font-size:22px;\"><span style=\"color:#000000;\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><b><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:bold\"><font face=\"Open Sans\">5. Como melhorar o desempenho do adesivo sens\u00edvel \u00e0 press\u00e3o?<\/font><\/span><\/span><\/b><\/span><\/span><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\">O adesivo sens\u00edvel \u00e0 press\u00e3o de silicone possui excelente resist\u00eancia a produtos qu\u00edmicos, \u00e1gua, \u00f3leos, solventes, altas e baixas temperaturas, degrada\u00e7\u00e3o t\u00e9rmica, degrada\u00e7\u00e3o oxidativa e outras propriedades. Pode unir uma variedade de materiais dif\u00edceis de colar, como poliolefinas sem tratamento superficial (BOPP, PET, PE, etc.), pl\u00e1sticos fluorados, poliamida e policarbonato. Como melhorar a competitividade dos produtos?<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"color:#000000;\"><span style=\"font-size:10.5pt\"><span style=\"font-family:Calibri\"><span style=\"font-size:12.0000pt\"><span style=\"font-family:\u5b8b\u4f53\"><span style=\"font-weight:normal\"><font face=\"Open Sans\"><a href=\"https:\/\/www.xjysilicone.com\/pt\/\">XJY Silicones<\/a> \u00e9 um dos principais <a href=\"https:\/\/www.xjysilicone.com\/pt\/resin-series.html\/\">resina de silicone MQ<\/a> e <a href=\"https:\/\/www.xjysilicone.com\/pt\/vmq.html\/\">Silicone VMQ<\/a> fabricantes na China, com mais de 30 anos de experi\u00eancia em P&amp;D e fabrica\u00e7\u00e3o na ind\u00fastria de silicone e mais de 15 patentes relacionadas e suporte t\u00e9cnico. Nossos <a href=\"https:\/\/www.xjysilicone.com\/pt\/products.html\/\">produtos de mat\u00e9rias-primas de silicone<\/a> pode satisfazer as necessidades dos <a href=\"https:\/\/www.xjysilicone.com\/pt\/pressure-sensitive-adhesive.html\/\">campo de adesivo sens\u00edvel \u00e0 press\u00e3o<\/a> e apoiar o fornecimento de solu\u00e7\u00f5es personalizadas diversificadas.<\/font><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.xjysilicone.com\/pt\/gallery.html\/\"><img decoding=\"async\" src=\"\/media\/145\/XJY%20SILICONES.jpg\" style=\"height: 449px; width: 800px;\"><\/a><br \/>&nbsp;<\/p>\n<\/p><\/div>\n<\/article><\/div>","protected":false},"excerpt":{"rendered":"<p>As aplica\u00e7\u00f5es de adesivos sens\u00edveis \u00e0 press\u00e3o continuam a se expandir, a demanda do mercado segue crescendo, e a conscientiza\u00e7\u00e3o ambiental e as pol\u00edticas de desenvolvimento sustent\u00e1vel que promovem a demanda por produtos de PSA de silicone tamb\u00e9m aumentaram gradualmente. Quais s\u00e3o as propriedades de ades\u00e3o do PSA de silicone? O PSA de silicone geralmente se refere a adesivos sens\u00edveis \u00e0 press\u00e3o com base em pol\u00edmero de silicone, ou adesivos sens\u00edveis \u00e0 press\u00e3o \u00e0 base de acr\u00edlico modificado com silicone e borracha...<\/p>","protected":false},"author":12,"featured_media":27680,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[609],"tags":[],"class_list":["post-27679","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pressure-sensitive-adhesive"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/posts\/27679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/comments?post=27679"}],"version-history":[{"count":0,"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/posts\/27679\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/media\/27680"}],"wp:attachment":[{"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/media?parent=27679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/categories?post=27679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xjysilicone.com\/pt\/wp-json\/wp\/v2\/tags?post=27679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}