{"id":18612,"date":"2025-10-12T12:46:26","date_gmt":"2025-10-12T12:46:26","guid":{"rendered":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549-cof-of-paper-paperboard-with-the-horizontal-plane-method-discuss-the-specific-use-and-purpose-you-can-write-extensively-about-what-a-particular-astm-test-method-is-design\/"},"modified":"2025-10-19T18:37:25","modified_gmt":"2025-10-19T18:37:25","slug":"tappi-t-549","status":"publish","type":"post","link":"https:\/\/www.qualtechproductsindustry.com\/pt\/tappi-t-549\/","title":{"rendered":"TAPPI T 549 \u2014 COF de papel e papel\u00e3o: uso, finalidade e vis\u00e3o do setor"},"content":{"rendered":"<p>Quando voc\u00ea precisa medir a facilidade com que papel ou cart\u00e3o desliza sobre superf\u00edcies, o m\u00e9todo TAPPI T 549 \u00e9 o padr\u00e3o da ind\u00fastria para determinar o coeficiente de atrito (COF). Este teste utiliza o m\u00e9todo do plano horizontal para medir a for\u00e7a necess\u00e1ria para mover um material sobre outro a uma velocidade constante. O teste \u00e9 essencial para\u2026 <\/p>\n<div class=\"pmpro\">\n<div class=\"pmpro_card pmpro_content_message\">\n<h2 class=\"pmpro_card_title pmpro_font-large\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"var(--pmpro--color--accent)\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-lock\"><rect x=\"3\" y=\"11\" width=\"18\" height=\"11\" rx=\"2\" ry=\"2\"><\/rect><path d=\"M7 11V7a5 5 0 0 1 10 0v4\"><\/path><\/svg>Cole\u00e7\u00e3o de Insights e Coment\u00e1rios (Assinatura necess\u00e1ria)<\/h2>\n<div class=\"pmpro_card_content\">\n<p> Voc\u00ea precisa ser assinante da Cole\u00e7\u00e3o de Insights e Coment\u00e1rios para acessar este conte\u00fado.<\/p>\n<p><a class=\"pmpro_btn\" href=\"https:\/\/www.qualtechproductsindustry.com\/pt\/membership-checkout\/?pmpro_level=1\">Inscreva-se agora<\/a><\/p>\n<\/div>\n<div class=\"pmpro_card_actions pmpro_font-medium\">J\u00e1 \u00e9 membro? <a href=\"https:\/\/www.qualtechproductsindustry.com\/pt\/login\/?redirect_to=https%3A%2F%2Fwww.qualtechproductsindustry.com%2Fpt%2Ftappi-t-549%2F\">Fa\u00e7a login aqui<\/a><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>When you need to measure how easily paper or paperboard slides against surfaces, TAPPI T 549 provides the industry standard method for determining the coefficient of friction (COF). This test uses the horizontal plane method to measure the force needed to move one material across another at a constant speed. The test is essential for... <\/p>\n<div class=\"pmpro\"><div class=\"pmpro_card pmpro_content_message\"><h2 class=\"pmpro_card_title pmpro_font-large\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"var(--pmpro--color--accent)\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-lock\"><rect x=\"3\" y=\"11\" width=\"18\" height=\"11\" rx=\"2\" ry=\"2\"><\/rect><path d=\"M7 11V7a5 5 0 0 1 10 0v4\"><\/path><\/svg>Cole\u00e7\u00e3o de Insights e Coment\u00e1rios (Assinatura necess\u00e1ria)<\/h2><div class=\"pmpro_card_content\"><p> Voc\u00ea precisa ser assinante da Cole\u00e7\u00e3o de Insights e Coment\u00e1rios para acessar este conte\u00fado.<\/p><p><a class=\"pmpro_btn\" href=\"https:\/\/www.qualtechproductsindustry.com\/pt\/membership-checkout\/?pmpro_level=1\">Inscreva-se agora<\/a><\/p><\/div><div class=\"pmpro_card_actions pmpro_font-medium\">J\u00e1 \u00e9 membro? <a href=\"https:\/\/www.qualtechproductsindustry.com\/pt\/login\/?redirect_to=https%3A%2F%2Fwww.qualtechproductsindustry.com%2Fpt%2Ftappi-t-549%2F\">Fa\u00e7a login aqui<\/a><\/div><\/div><\/div>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pmpro_default_level":"","footnotes":""},"categories":[534,543],"tags":[],"class_list":["post-18612","post","type-post","status-publish","format-standard","hentry","category-science","category-tappi","pmpro-level-required","pmpro-level-1","pmpro-no-access"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TAPPI T 549 \u2014 COF of Paper &amp; Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.qualtechproductsindustry.com\/pt\/tappi-t-549\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TAPPI T 549 \u2014 COF of Paper &amp; Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY\" \/>\n<meta property=\"og:description\" content=\"When you need to measure how easily paper or paperboard slides against surfaces, TAPPI T 549 provides the industry standard method for determining the coefficient of friction (COF). This test uses the horizontal plane method to measure the force needed to move one material across another at a constant speed. The test is essential for\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.qualtechproductsindustry.com\/pt\/tappi-t-549\/\" \/>\n<meta property=\"og:site_name\" content=\"QUALTECH PRODUCTS INDUSTRY\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-12T12:46:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-19T18:37:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\" \/>\n<meta name=\"author\" content=\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"18 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\"},\"author\":{\"name\":\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#\\\/schema\\\/person\\\/f3d5d0194c89a77c5a600a2dff638d27\"},\"headline\":\"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight\",\"datePublished\":\"2025-10-12T12:46:26+00:00\",\"dateModified\":\"2025-10-19T18:37:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\"},\"wordCount\":3651,\"image\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\",\"articleSection\":[\"Science and Research\",\"TAPPI Test Standards\"],\"inLanguage\":\"pt-PT\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\",\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\",\"name\":\"TAPPI T 549 \u2014 COF of Paper & Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\",\"datePublished\":\"2025-10-12T12:46:26+00:00\",\"dateModified\":\"2025-10-19T18:37:25+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#\\\/schema\\\/person\\\/f3d5d0194c89a77c5a600a2dff638d27\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\",\"url\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\",\"contentUrl\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#website\",\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/\",\"name\":\"QUALTECH PRODUCTS INDUSTRY\",\"description\":\"Precision Test Instruments &amp; Test Equipment &amp; Production Machinery for Research &amp; Quality Management &amp; Industrial Production\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#\\\/schema\\\/person\\\/f3d5d0194c89a77c5a600a2dff638d27\",\"name\":\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/wp-content\\\/litespeed\\\/avatar\\\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1780482911\",\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/wp-content\\\/litespeed\\\/avatar\\\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1780482911\",\"contentUrl\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/wp-content\\\/litespeed\\\/avatar\\\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1780482911\",\"caption\":\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\"},\"sameAs\":[\"https:\\\/\\\/www.qualtechproductsindustry.com\"],\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/pt\\\/author\\\/888kaiqpirich888\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"TAPPI T 549 \u2014 Certificado de Fabrica\u00e7\u00e3o de Papel e Cart\u00e3o: Uso, Finalidade e Vis\u00e3o Geral da Ind\u00fastria - QUALTECH PRODUCTS INDUSTRY","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.qualtechproductsindustry.com\/pt\/tappi-t-549\/","og_locale":"pt_PT","og_type":"article","og_title":"TAPPI T 549 \u2014 COF of Paper & Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY","og_description":"When you need to measure how easily paper or paperboard slides against surfaces, TAPPI T 549 provides the industry standard method for determining the coefficient of friction (COF). This test uses the horizontal plane method to measure the force needed to move one material across another at a constant speed. The test is essential for","og_url":"https:\/\/www.qualtechproductsindustry.com\/pt\/tappi-t-549\/","og_site_name":"QUALTECH PRODUCTS INDUSTRY","article_published_time":"2025-10-12T12:46:26+00:00","article_modified_time":"2025-10-19T18:37:25+00:00","og_image":[{"url":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","type":"","width":"","height":""}],"author":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research","twitter_card":"summary_large_image","twitter_misc":{"Written by":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research","Est. reading time":"18 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#article","isPartOf":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/"},"author":{"name":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research","@id":"https:\/\/www.qualtechproductsindustry.com\/#\/schema\/person\/f3d5d0194c89a77c5a600a2dff638d27"},"headline":"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight","datePublished":"2025-10-12T12:46:26+00:00","dateModified":"2025-10-19T18:37:25+00:00","mainEntityOfPage":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/"},"wordCount":3651,"image":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage"},"thumbnailUrl":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","articleSection":["Science and Research","TAPPI Test Standards"],"inLanguage":"pt-PT"},{"@type":"WebPage","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/","url":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/","name":"TAPPI T 549 \u2014 Certificado de Fabrica\u00e7\u00e3o de Papel e Cart\u00e3o: Uso, Finalidade e Vis\u00e3o Geral da Ind\u00fastria - QUALTECH PRODUCTS INDUSTRY","isPartOf":{"@id":"https:\/\/www.qualtechproductsindustry.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage"},"image":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage"},"thumbnailUrl":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","datePublished":"2025-10-12T12:46:26+00:00","dateModified":"2025-10-19T18:37:25+00:00","author":{"@id":"https:\/\/www.qualtechproductsindustry.com\/#\/schema\/person\/f3d5d0194c89a77c5a600a2dff638d27"},"breadcrumb":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#breadcrumb"},"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/"]}]},{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage","url":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","contentUrl":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream"},{"@type":"BreadcrumbList","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.qualtechproductsindustry.com\/"},{"@type":"ListItem","position":2,"name":"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight"}]},{"@type":"WebSite","@id":"https:\/\/www.qualtechproductsindustry.com\/#website","url":"https:\/\/www.qualtechproductsindustry.com\/","name":"IND\u00daSTRIA DE PRODUTOS QUALTECH","description":"Instrumentos de teste de precis\u00e3o e equipamentos de teste e m\u00e1quinas de produ\u00e7\u00e3o para pesquisa e gerenciamento de qualidade e produ\u00e7\u00e3o industrial","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.qualtechproductsindustry.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pt-PT"},{"@type":"Person","@id":"https:\/\/www.qualtechproductsindustry.com\/#\/schema\/person\/f3d5d0194c89a77c5a600a2dff638d27","name":"IND\u00daSTRIA DE PRODUTOS QUALTECH Ci\u00eancia e Pesquisa","image":{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/www.qualtechproductsindustry.com\/wp-content\/litespeed\/avatar\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1780482911","url":"https:\/\/www.qualtechproductsindustry.com\/wp-content\/litespeed\/avatar\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1780482911","contentUrl":"https:\/\/www.qualtechproductsindustry.com\/wp-content\/litespeed\/avatar\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1780482911","caption":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research"},"sameAs":["https:\/\/www.qualtechproductsindustry.com"],"url":"https:\/\/www.qualtechproductsindustry.com\/pt\/author\/888kaiqpirich888\/"}]}},"_links":{"self":[{"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/posts\/18612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/comments?post=18612"}],"version-history":[{"count":1,"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/posts\/18612\/revisions"}],"predecessor-version":[{"id":18622,"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/posts\/18612\/revisions\/18622"}],"wp:attachment":[{"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/media?parent=18612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/categories?post=18612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/pt\/wp-json\/wp\/v2\/tags?post=18612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}