{"id":134,"date":"2025-03-27T08:01:03","date_gmt":"2025-03-27T08:01:03","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=134"},"modified":"2025-09-18T09:02:07","modified_gmt":"2025-09-18T09:02:07","slug":"astm-d1894","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/pt\/astm-d1894","title":{"rendered":"ASTM D1894"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"134\" class=\"elementor elementor-134\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e87c6b2 e-flex e-con-boxed e-con e-parent\" data-id=\"e87c6b2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d087c52 e-con-full e-flex e-con e-child\" data-id=\"d087c52\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d9f31fd elementor-invisible elementor-widget elementor-widget-image\" data-id=\"d9f31fd\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"200\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1.webp\" class=\"attachment-large size-large wp-image-77\" alt=\"ASTM D1894\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1-300x100.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-60fbb6b e-con-full e-flex e-con e-child\" data-id=\"60fbb6b\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e3633c elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"0e3633c\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9todo de ensaio dos coeficientes de atrito est\u00e1tico e cin\u00e9tico de pel\u00edculas e folhas de pl\u00e1stico<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a73bac6 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a73bac6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"464\" data-end=\"1024\">Em ensaios de materiais, <em data-start=\"485\" data-end=\"497\">ASTM D1894<\/em> \u00e9 uma das normas mais amplamente reconhecidas para determinar a <strong data-start=\"565\" data-end=\"612\">coeficientes de atrito est\u00e1tico e cin\u00e9tico<\/strong> de pel\u00edculas e folhas de pl\u00e1stico. Este m\u00e9todo de ensaio normalizado fornece dados cruciais para a avalia\u00e7\u00e3o das propriedades de deslizamento, que afectam diretamente o desempenho da embalagem, a efici\u00eancia do processamento e a satisfa\u00e7\u00e3o do utilizador final. Ao seguir o <em data-start=\"836\" data-end=\"856\">Ensaios ASTM D1894<\/em> os fabricantes e os profissionais de controlo de qualidade podem garantir que as pel\u00edculas cumprem as expectativas de desempenho, reduzindo as falhas do produto e melhorando a consist\u00eancia.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7d644ae e-flex e-con-boxed e-con e-parent\" data-id=\"7d644ae\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-08ee8ec elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"08ee8ec\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">O que \u00e9 a ASTM D1894?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4bea887 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"4bea887\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1062\" data-end=\"1361\">A norma ASTM D1894 define a forma de medir as propriedades de fric\u00e7\u00e3o quando uma amostra desliza sobre si pr\u00f3pria ou sobre outro substrato. Os valores resultantes s\u00e3o expressos como <strong data-start=\"1217\" data-end=\"1257\">coeficiente de atrito est\u00e1tico (COF)<\/strong>-a for\u00e7a necess\u00e1ria para iniciar o deslizamento- e a <strong data-start=\"1305\" data-end=\"1320\">COF cin\u00e9tico<\/strong>-a for\u00e7a necess\u00e1ria para manter o movimento.<\/p><p data-start=\"1363\" data-end=\"1664\">A import\u00e2ncia destes par\u00e2metros reside na sua rela\u00e7\u00e3o direta com <strong data-start=\"1437\" data-end=\"1509\">manuseamento da pel\u00edcula, desempenho da m\u00e1quina de embalagem e facilidade de utiliza\u00e7\u00e3o pelo consumidor<\/strong>. Por exemplo, as pel\u00edculas com um COF demasiado elevado podem encravar as m\u00e1quinas de embalagem, enquanto as pel\u00edculas com um COF demasiado baixo podem deslizar descontroladamente durante o empilhamento ou a embalagem.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0364755 e-flex e-con-boxed e-con e-parent\" data-id=\"0364755\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f673fbc elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"f673fbc\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9todo de Ensaio do Coeficiente de Fric\u00e7\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156f03e elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"156f03e\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>O coeficiente de fric\u00e7\u00e3o (COF) quantifica a facilidade com que um material desliza sobre outro. A norma ASTM D1894 descreve duas medidas-chave:<\/p><ul data-spread=\"false\"><li><p><strong>COF est\u00e1tico<\/strong>: A for\u00e7a necess\u00e1ria para iniciar o movimento entre duas superf\u00edcies.<\/p><\/li><li><p><strong>COF cin\u00e9tico<\/strong>: A for\u00e7a necess\u00e1ria para manter o movimento ap\u00f3s o in\u00edcio do deslizamento.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38e9bd9 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"38e9bd9\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Procedimento de Ensaio do Coeficiente de Fric\u00e7\u00e3o<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec3aabc elementor-widget elementor-widget-text-editor\" data-id=\"ec3aabc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"2386\" data-end=\"2545\">O teste real\u00e7a a forma como as propriedades de deslizamento evoluem ao longo do tempo, um fator cr\u00edtico em pel\u00edculas com aditivos dependentes do tempo.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b4a43e8 e-con-full e-flex e-con e-child\" data-id=\"b4a43e8\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-949eee6 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"949eee6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li>A <strong>tren\u00f3<\/strong> (normalmente metal com um peso normalizado) \u00e9 colocado no material de teste.<\/li><li>A amostra de ensaio \u00e9 fixada numa <strong>plano liso<\/strong> (frequentemente uma superf\u00edcie polida como o vidro ou o metal).<\/li><li>Um dispositivo de medi\u00e7\u00e3o de for\u00e7a, como um <strong>COF-01 Equipamento de ensaio do coeficiente de atrito<\/strong>O tren\u00f3 \u00e9 puxado gradualmente pela superf\u00edcie.<\/li><li>A resist\u00eancia \u00e9 medida e utilizada para calcular o <strong>coeficientes de atrito est\u00e1tico e cin\u00e9tico<\/strong>.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e43e1f1 elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-video\" data-id=\"e43e1f1\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/NUgXENOz8J0&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;_animation&quot;:&quot;fadeInRight&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36f0624 elementor-widget elementor-widget-text-editor\" data-id=\"36f0624\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3206\" data-end=\"3431\">Resultados exactos dependem em grande medida de <strong data-start=\"3241\" data-end=\"3318\">prepara\u00e7\u00e3o de amostras, calibra\u00e7\u00e3o de equipamentos e controlo do ambiente de ensaio<\/strong>. A contamina\u00e7\u00e3o da superf\u00edcie, a forma\u00e7\u00e3o irregular de aditivos ou a fixa\u00e7\u00e3o incorrecta podem conduzir a resultados enganadores.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9d958da e-flex e-con-boxed e-con e-parent\" data-id=\"9d958da\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5055911 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"5055911\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Equipamento de teste do coeficiente de atrito<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cac45b elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"7cac45b\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"1 1 []\">Para efetuar <a href=\"https:\/\/www.coefficientfriction.com\/pt\/astm-d1894\"><strong>ASTM D1894<\/strong><\/a> testes exactos, especializados <a href=\"https:\/\/www.coefficientfriction.com\/pt\/coefficient-of-friction-testing-equipment\/\"><strong>equipamento de ensaio do coeficiente de atrito<\/strong><\/a> \u00e9 necess\u00e1rio. Estes instrumentos asseguram um controlo preciso das vari\u00e1veis de ensaio, como a velocidade, a for\u00e7a e as condi\u00e7\u00f5es ambientais.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0424cfa e-con-full e-grid e-con e-child\" data-id=\"0424cfa\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-a290580 e-con-full e-flex e-con e-child\" data-id=\"a290580\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-02517ec elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"02517ec\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Componentes principais do equipamento de ensaio de COF<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38c9c0f elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"38c9c0f\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>Tren\u00f3<\/strong>: Um bloco de peso normalizado utilizado para a medi\u00e7\u00e3o do atrito.<\/li><li><strong>Plano de ensaio<\/strong>: Uma superf\u00edcie lisa e est\u00e1vel sobre a qual \u00e9 colocado o material de ensaio.<\/li><li><strong>Sensor de for\u00e7a<\/strong>: Mede a resist\u00eancia entre o tren\u00f3 e a amostra.<\/li><li><strong>Sistema de polias<\/strong>: Mant\u00e9m a aplica\u00e7\u00e3o uniforme da for\u00e7a.<\/li><li><strong>Sistema de aquisi\u00e7\u00e3o de dados<\/strong>: Regista e calcula os valores est\u00e1ticos e cin\u00e9ticos do COF.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3a3fc5c e-con-full e-flex e-con e-child\" data-id=\"3a3fc5c\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9e1f2e3 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"9e1f2e3\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.coefficientfriction.com\/pt\/coefficient-of-friction-testing-equipment\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01.webp\" class=\"attachment-full size-full wp-image-96\" alt=\"equipamento de ensaio do coeficiente de atrito 01\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01-300x300.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01-150x150.webp 150w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1nnljvgm1sgd9e374sfjg8cayrot70czv2xs.webp 400w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1ovgcb2m7iva4k79z5gvnv026hkls6iecayw.webp 500w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1nwdb5s7ojc5fmiewgn0ak2nlwv641l9yiy0.webp 420w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4dda243 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"4dda243\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3780\" data-end=\"4096\">Entre as solu\u00e7\u00f5es dispon\u00edveis, a <strong>Coefficientfriction.com's<\/strong><strong data-start=\"3811\" data-end=\"3869\">\u00a0COF-01 Medidor do coeficiente de atrito<\/strong> destaca-se pela sua exatid\u00e3o e conformidade com a norma ASTM D1894. Concebido tanto para pel\u00edculas como para folhas, o COF-01 garante resultados repet\u00edveis, tornando-o ideal para laborat\u00f3rios, empresas de embalagem e ag\u00eancias de inspe\u00e7\u00e3o de qualidade.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-662ac3d e-flex e-con-boxed e-con e-parent\" data-id=\"662ac3d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5bc195f elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"5bc195f\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Considera\u00e7\u00f5es sobre fixa\u00e7\u00e3o e configura\u00e7\u00e3o ASTM D1894<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac9f0d2 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"ac9f0d2\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"4153\" data-end=\"4278\">O <strong data-start=\"4157\" data-end=\"4179\">Fixa\u00e7\u00e3o ASTM D1894<\/strong> inclui um plano e um tren\u00f3 de peso e dimens\u00f5es especificadas. Para conseguir a reprodutibilidade:<\/p><ul><li data-start=\"4282\" data-end=\"4355\">O tren\u00f3 deve mover-se paralelamente \u00e0 dire\u00e7\u00e3o da m\u00e1quina do provete.<\/li><li data-start=\"4358\" data-end=\"4426\">As arestas devem ser quadradas e os esp\u00e9cimes devem ser planos, sem rugas.<\/li><li data-start=\"4429\" data-end=\"4515\">Para ter em conta a variabilidade, devem ser testados pelo menos cinco esp\u00e9cimes para cada amostra.<\/li><\/ul><p data-start=\"4517\" data-end=\"4633\">A aten\u00e7\u00e3o a estes pormenores garante que os resultados n\u00e3o s\u00e3o distorcidos por irregularidades dos esp\u00e9cimes ou por uma montagem incorrecta.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-25d6974 e-flex e-con-boxed e-con e-parent\" data-id=\"25d6974\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-beb4dba elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"beb4dba\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Teste ASTM D1894: Porque \u00e9 que \u00e9 importante<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b35d205 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"b35d205\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1712\" data-end=\"1902\">O <strong data-start=\"1716\" data-end=\"1738\">Ensaios ASTM D1894<\/strong> garante que os fornecedores de materiais e os utilizadores finais possam comunicar numa linguagem t\u00e9cnica comum. Algumas das principais raz\u00f5es pelas quais este teste \u00e9 amplamente aplicado incluem:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cca6b83 e-grid e-con-full e-con e-child\" data-id=\"cca6b83\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-43f140f e-con-full e-flex e-con e-child\" data-id=\"43f140f\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4aaca6d elementor-widget elementor-widget-heading\" data-id=\"4aaca6d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Garantia de qualidade na produ\u00e7\u00e3o<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5cb04ab elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"5cb04ab\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Os valores emp\u00edricos de COF permitem aos produtores de pel\u00edculas monitorizar as propriedades de deslizamento e manter a consist\u00eancia.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cebaebb e-con-full e-flex e-con e-child\" data-id=\"cebaebb\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a94d1e5 elementor-widget elementor-widget-heading\" data-id=\"a94d1e5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Previs\u00e3o do desempenho da embalagem<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3333f6a elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"3333f6a\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ao correlacionar os resultados dos testes com o desempenho no mundo real, os fabricantes podem antecipar os problemas de manuseamento antes de estes ocorrerem.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bfb5798 e-con-full e-flex e-con e-child\" data-id=\"bfb5798\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-38d70d9 elementor-widget elementor-widget-heading\" data-id=\"38d70d9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Avalia\u00e7\u00e3o de aditivos<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3773016 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"3773016\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>As propriedades de deslizamento resultam frequentemente de aditivos em pel\u00edculas, como o polietileno. Os ensaios ajudam a avaliar a efic\u00e1cia e a estabilidade destes aditivos.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4b2c572 e-con-full e-flex e-con e-child\" data-id=\"4b2c572\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-49c7ffd elementor-widget elementor-widget-heading\" data-id=\"49c7ffd\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Efeitos do envelhecimento e do estado da superf\u00edcie<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3390706 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"3390706\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"2386\" data-end=\"2545\">O teste real\u00e7a a forma como as propriedades de deslizamento evoluem ao longo do tempo, um fator cr\u00edtico em pel\u00edculas com aditivos dependentes do tempo.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6d2c64c e-flex e-con-boxed e-con e-parent\" data-id=\"6d2c64c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c394047 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"c394047\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b484e06 elementor-invisible elementor-widget elementor-widget-n-accordion\" data-id=\"b484e06\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;max_items_expended&quot;:&quot;multiple&quot;,&quot;default_state&quot;:&quot;expanded&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Acorde\u00e3o. Abrir liga\u00e7\u00f5es com Enter ou Espa\u00e7o, fechar com Escape e navegar com Setas\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1890\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-1890\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 1. Porque \u00e9 que a ASTM D1894 \u00e9 importante para a ind\u00fastria da embalagem? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1890\" class=\"elementor-element elementor-element-4dda86b e-con-full e-flex e-con e-child\" data-id=\"4dda86b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b1ee56f elementor-widget elementor-widget-text-editor\" data-id=\"b1ee56f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Garante que as pel\u00edculas de pl\u00e1stico t\u00eam as propriedades de deslizamento corretas para um processamento suave e para a prote\u00e7\u00e3o do produto.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1891\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1891\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 2. Qual \u00e9 a diferen\u00e7a entre o coeficiente de atrito est\u00e1tico e cin\u00e9tico? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1891\" class=\"elementor-element elementor-element-4213cd7 e-con-full e-flex e-con e-child\" data-id=\"4213cd7\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5cb0ea elementor-widget elementor-widget-text-editor\" data-id=\"a5cb0ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>O COF est\u00e1tico mede a for\u00e7a necess\u00e1ria para iniciar o movimento, enquanto o COF cin\u00e9tico mede a for\u00e7a necess\u00e1ria para manter o movimento.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1892\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1892\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 3. Como \u00e9 que as condi\u00e7\u00f5es ambientais afectam os ensaios de COF? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1892\" class=\"elementor-element elementor-element-8cbaf70 e-con-full e-flex e-con e-child\" data-id=\"8cbaf70\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ed707d2 elementor-widget elementor-widget-text-editor\" data-id=\"ed707d2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A temperatura, a humidade e os contaminantes da superf\u00edcie podem afetar as medi\u00e7\u00f5es de fric\u00e7\u00e3o.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Test Method for Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting In material testing, ASTM D1894 is one of the most widely recognized standards for determining the static and kinetic coefficients of friction of plastic films and sheeting. This standard test method provides crucial data for evaluating slip properties, which directly affect [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-134","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages\/134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/comments?post=134"}],"version-history":[{"count":6,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages\/134\/revisions"}],"predecessor-version":[{"id":708,"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/pages\/134\/revisions\/708"}],"wp:attachment":[{"href":"https:\/\/www.coefficientfriction.com\/pt\/wp-json\/wp\/v2\/media?parent=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}