{"id":9364,"date":"2026-07-10T17:00:06","date_gmt":"2026-07-10T09:00:06","guid":{"rendered":"https:\/\/meettfit.com\/?p=9364"},"modified":"2026-07-11T16:24:19","modified_gmt":"2026-07-11T08:24:19","slug":"what-is-the-difference-between-tvoc-and-voc","status":"publish","type":"post","link":"https:\/\/meettfit.com\/pt\/blogue-sobre-pavimentos-em-pvc\/qual-e-a-diferenca-entre-tvoc-e-voc\/","title":{"rendered":"Qual \u00e9 a diferen\u00e7a entre TVOC e VOC?"},"content":{"rendered":"<p>A principal diferen\u00e7a reside no facto de o VOC se referir a gases qu\u00edmicos org\u00e2nicos individuais que s\u00e3o libertados para o ar, enquanto o TVOC corresponde \u00e0 soma total de todos esses gases qu\u00edmicos emitidos simultaneamente pelo seu pavimento em PVC.<\/p>\n<p>Todos os dias, no nosso laborat\u00f3rio de testes, abro novos lotes de rolos de vinil, SPC e pavimentos LVT. Muitos compradores sentem aquele \u00abcheiro caracter\u00edstico de pavimento novo\u00bb e ficam imediatamente preocupados com a seguran\u00e7a. V\u00eaem os valores de COV e TVOC nos relat\u00f3rios de ensaio, mas n\u00e3o sabem qual \u00e9 a verdadeira diferen\u00e7a. Este guia ir\u00e1 ajud\u00e1-lo a interpretar estas fichas t\u00e9cnicas, a compreender os valores reais relativos \u00e0 sa\u00fade e a escolher pavimentos em PVC seguros, com certifica\u00e7\u00e3o 100%, para o seu projeto.<\/p>\n<h3>O que s\u00e3o os COV nos pavimentos de PVC?<\/h3>\n<p>Os compostos org\u00e2nicos vol\u00e1teis, ou COV, s\u00e3o subst\u00e2ncias qu\u00edmicas \u00e0 base de carbono que se transformam em g\u00e1s \u00e0 temperatura ambiente normal. Na nossa oficina de controlo de qualidade, procuramos COV nocivos espec\u00edficos que prov\u00eam de mat\u00e9rias-primas de baixa qualidade. <\/p>\n<p>Por exemplo, os pavimentos de vinil multicamadas de baixo custo utilizam frequentemente colas de baixa qualidade que libertam formalde\u00eddo. O vinil flex\u00edvel de baixo custo pode conter ftalatos ou plastificantes, que est\u00e3o sujeitos a limites rigorosos no com\u00e9rcio mundial. Al\u00e9m disso, as tintas de impress\u00e3o e os acabamentos de superf\u00edcie de baixa qualidade podem libertar benzeno e tolueno.<\/p>\n<p>No entanto, existe um grande mito de que todos os pavimentos em PVC s\u00e3o t\u00f3xicos. Isso \u00e9 falso. A resina de PVC pura e virgem n\u00e3o liberta naturalmente COV perigosos. O verdadeiro risco prov\u00e9m das f\u00e1bricas que utilizam res\u00edduos pl\u00e1sticos reciclados ou aditivos baratos para poupar dinheiro.<\/p>\n<p>Isto leva-nos \u00e0 pr\u00f3xima m\u00e9trica importante que medimos no interior das nossas c\u00e2maras de ensaio ambientais seladas.<\/p>\n<h2>O que \u00e9 o TVOC na ind\u00fastria dos pavimentos?<\/h2>\n<p><strong>TVOC significa \u00abTotal Volatile Organic Compounds\u00bb (Compostos Org\u00e2nicos Vol\u00e1teis Totais), ou seja, a concentra\u00e7\u00e3o total combinada de todos os gases VOC que se libertam do pavimento em PVC para o ar da divis\u00e3o num determinado momento.<\/strong><\/p>\n<h3>An\u00e1lise t\u00e9cnica aprofundada das medi\u00e7\u00f5es de TVOC<\/h3>\n<p>Muitos compradores pedem-me um certificado de \u00abaus\u00eancia de formalde\u00eddo\u00bb. Eu digo-lhes que isso n\u00e3o \u00e9 suficiente. Um pavimento pode n\u00e3o conter formalde\u00eddo, mas mesmo assim libertar muitos outros solventes qu\u00edmicos. \u00c9 por isso que o TVOC \u00e9 a melhor forma de avaliar a verdadeira qualidade do ar interior. Se o valor do TVOC for elevado, o ar n\u00e3o \u00e9 seguro.<\/p>\n<p>No nosso laborat\u00f3rio de controlo de qualidade, colocamos amostras de pavimentos dentro de uma c\u00e2mara de ensaio em a\u00e7o inoxid\u00e1vel durante um longo per\u00edodo de tempo. Recolhemos amostras de ar e analisamo-las no 3.\u00ba e no 28.\u00ba dia. Este ensaio mostra-nos a rapidez com que o pavimento deixa de libertar gases ao longo do tempo. Os pavimentos de alta qualidade apresentam uma queda significativa nos COV totais (TVOC) ap\u00f3s algumas semanas.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Dia de Testes<\/th>\n<th style=\"text-align: left;\">Limite m\u00e1ximo permitido de TVOC<\/th>\n<th style=\"text-align: left;\">Estado da aprova\u00e7\u00e3o<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">Dia 3<\/td>\n<td style=\"text-align: left;\">\u2264 10 mg\/m\u00b3<\/td>\n<td style=\"text-align: left;\">Lan\u00e7amento inicial<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Dia 28<\/td>\n<td style=\"text-align: left;\">\u2264 0,5 mg\/m\u00b3<\/td>\n<td style=\"text-align: left;\">Utiliza\u00e7\u00e3o segura a longo prazo<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" src=\"https:\/\/meettfit.com\/wp-content\/uploads\/2026\/07\/pvc-1-7.jpeg&quot;\" alt=\"ensaio em c\u00e2mara de qualidade do ar para pavimentos\" \/><\/p>\n<p>Vamos comparar estas duas m\u00e9tricas diretamente, para que possa ler o seu pr\u00f3ximo relat\u00f3rio de laborat\u00f3rio como um inspetor profissional.<\/p>\n<h2>Como se comparam os valores de VOC e TVOC para quem compra pavimentos?<\/h2>\n<p><strong>O VOC mede subst\u00e2ncias t\u00f3xicas espec\u00edficas, como o formalde\u00eddo, para detetar a presen\u00e7a de produtos qu\u00edmicos proibidos, enquanto o TVOC mede o volume total de gases para avaliar a seguran\u00e7a geral do ar interior.<\/strong><\/p>\n<h3>Compara\u00e7\u00e3o t\u00e9cnica de m\u00e9tricas qu\u00edmicas<\/h3>\n<p>Na minha fun\u00e7\u00e3o de inspetor de controlo de qualidade, utilizo diferentes ferramentas para estas duas m\u00e9tricas. Para detetar um COV espec\u00edfico, recorremos \u00e0 cromatografia gasosa para separar cada mol\u00e9cula qu\u00edmica. No que diz respeito ao TVOC, analisamos o panorama geral no interior da c\u00e2mara de ensaio para verificar se o produto obt\u00e9m uma classifica\u00e7\u00e3o m\u00e1xima, como a certifica\u00e7\u00e3o francesa A+.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">M\u00e9trica<\/th>\n<th style=\"text-align: left;\">\u00c2mbito da medi\u00e7\u00e3o<\/th>\n<th style=\"text-align: left;\">Alvo principal<\/th>\n<th style=\"text-align: left;\">Equipamento de ensaio<\/th>\n<th style=\"text-align: left;\">Destaques da ficha t\u00e9cnica<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>COV<\/strong><\/td>\n<td style=\"text-align: left;\">Gases qu\u00edmicos isolados<\/td>\n<td style=\"text-align: left;\">Identifica\u00e7\u00e3o de aditivos t\u00f3xicos<\/td>\n<td style=\"text-align: left;\">Cromatografia em fase gasosa<\/td>\n<td style=\"text-align: left;\">Limites qu\u00edmicos cumpridos ou n\u00e3o cumpridos<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>TVOC<\/strong><\/td>\n<td style=\"text-align: left;\">Volume total de todos os gases<\/td>\n<td style=\"text-align: left;\">Medir o impacto total no ar<\/td>\n<td style=\"text-align: left;\">C\u00e2mara ambiental<\/td>\n<td style=\"text-align: left;\">Classifica\u00e7\u00e3o geral de emiss\u00f5es (por exemplo, A+)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Compreender estes n\u00fameros ajuda a resolver a maior preocupa\u00e7\u00e3o dos utilizadores, que s\u00e3o os limites relacionados com a sa\u00fade f\u00edsica e a seguran\u00e7a.<\/p>\n<h2>Quais s\u00e3o os limites seguros no que diz respeito aos receios relacionados com a sa\u00fade dos pavimentos?<\/h2>\n<p><strong>Um n\u00edvel seguro de TVOC para pavimentos de PVC em espa\u00e7os interiores \u00e9 inferior ou igual a 0,5 mg\/m\u00b3 ap\u00f3s 28 dias de ensaio, o que significa que o ar est\u00e1 limpo e seguro.<\/strong><\/p>\n<h3>An\u00e1lise dos limites de seguran\u00e7a e dos sintomas de sa\u00fade<\/h3>\n<p>Quando os utilizadores finais instalam pavimentos de baixa qualidade em espa\u00e7os com m\u00e1 ventila\u00e7\u00e3o, queixam-se frequentemente de dores de cabe\u00e7a, comich\u00e3o nos olhos ou irrita\u00e7\u00e3o na garganta. A exposi\u00e7\u00e3o prolongada a n\u00edveis elevados de subst\u00e2ncias qu\u00edmicas constitui um risco grave. \u00c9 por isso que a nossa f\u00e1brica cumpre as normas internacionais mais rigorosas.<\/p>\n<p>Analisamos atentamente as normas europeias, como o sistema alem\u00e3o AgBB e o r\u00f3tulo franc\u00eas de COV. Para que um pavimento obtenha a classifica\u00e7\u00e3o m\u00e1xima A+, as emiss\u00f5es de gases t\u00eam de ser extremamente baixas. Se um fornecedor lhe apresentar um relat\u00f3rio com valores superiores a 0,5 mg\/m\u00b3, deve optar por um pavimento diferente.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Classifica\u00e7\u00e3o de emiss\u00f5es<\/th>\n<th style=\"text-align: left;\">Intervalo de TVOC aos 28 dias<\/th>\n<th style=\"text-align: left;\">Avalia\u00e7\u00e3o da seguran\u00e7a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>A+ (Excelente)<\/strong><\/td>\n<td style=\"text-align: left;\">&lt; 1,0 mg\/m\u00b3 (total) \/ \u2264 0,5 mg\/m\u00b3<\/td>\n<td style=\"text-align: left;\">Altamente seguro<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>A<\/strong><\/td>\n<td style=\"text-align: left;\">&lt; 1,5 mg\/m\u00b3<\/td>\n<td style=\"text-align: left;\">Aceit\u00e1vel<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>B<\/strong><\/td>\n<td style=\"text-align: left;\">&lt; 2,0 mg\/m\u00b3<\/td>\n<td style=\"text-align: left;\">\u00c9 necess\u00e1rio ter cuidado<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" src=\"https:\/\/meettfit.com\/wp-content\/uploads\/2026\/07\/pvc-2-7.jpeg&quot;\" alt=\"verifica\u00e7\u00e3o da certifica\u00e7\u00e3o ecol\u00f3gica do pavimento em PVC\" \/><\/p>\n<p>Agora, vamos ver como a nossa equipa de produ\u00e7\u00e3o controla estes valores na linha de produ\u00e7\u00e3o.<\/p>\n<h2>De que forma os processos de fabrico alteram os n\u00edveis de COV e TVOC?<\/h2>\n<p><strong>A utiliza\u00e7\u00e3o da resina de PVC virgem 100%, a liga\u00e7\u00e3o t\u00e9rmica intensa e os revestimentos UV \u00e0 base de \u00e1gua reduzem os n\u00edveis de TVOC para valores pr\u00f3ximos de zero.<\/strong><\/p>\n<h3>Escolhas de engenharia no ch\u00e3o de f\u00e1brica<\/h3>\n<p>A escolha da mat\u00e9ria-prima \u00e9 o passo mais importante. N\u00e3o utilizamos pl\u00e1stico reciclado, pois este cont\u00e9m res\u00edduos qu\u00edmicos desconhecidos que elevam os valores de TVOC. O PVC virgem proporciona-nos resultados est\u00e1veis e limpos em todas as ocasi\u00f5es. <\/p>\n<p>O m\u00e9todo de fabrico tamb\u00e9m \u00e9 importante. Por exemplo, os pavimentos SPC utilizam um m\u00e9todo de extrus\u00e3o por prensagem a quente. Unimos o p\u00f3 de pedra e as camadas de vinil utilizando calor e press\u00e3o extremos, em vez de colas t\u00f3xicas. A aus\u00eancia de cola significa que n\u00e3o h\u00e1 formalde\u00eddo e que o \u00edndice de TVOC \u00e9 muito baixo.<\/p>\n<p>Por fim, aplicamos na superf\u00edcie um acabamento especial \u00e0 base de \u00e1gua ou de origem biol\u00f3gica, com secagem por UV. Esta camada funciona como um selante. Impermeabiliza o pavimento e impede que quaisquer gases remanescentes, por mais \u00ednfimos que sejam, escapem para o ar da divis\u00e3o.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Elemento de Fabrico<\/th>\n<th style=\"text-align: left;\">Op\u00e7\u00e3o de baixa qualidade<\/th>\n<th style=\"text-align: left;\">Op\u00e7\u00e3o de alta qualidade (baixo teor de TVOC)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Material de base<\/strong><\/td>\n<td style=\"text-align: left;\">Res\u00edduos de PVC reciclados<\/td>\n<td style=\"text-align: left;\">Resina de PVC virgem 100%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Liga\u00e7\u00e3o entre camadas<\/strong><\/td>\n<td style=\"text-align: left;\">Colas \u00e0 base de solvente<\/td>\n<td style=\"text-align: left;\">Extrus\u00e3o a quente<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Revestimento de acabamento<\/strong><\/td>\n<td style=\"text-align: left;\">Verniz qu\u00edmico barato<\/td>\n<td style=\"text-align: left;\">Verniz UV \u00e0 base de \u00e1gua<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" src=\"https:\/\/meettfit.com\/wp-content\/uploads\/2026\/07\/pvc-4-6.jpeg&quot;\" alt=\"linha de produ\u00e7\u00e3o de pavimentos em PVC\" \/><\/p>\n<p>Para comprovar que estas etapas de fabrico funcionam, \u00e9 necess\u00e1rio procurar emblemas globais aut\u00eanticos.<\/p>\n<h2>Quais s\u00e3o as principais certifica\u00e7\u00f5es mundiais para pavimentos em PVC?<\/h2>\n<p><strong>As certifica\u00e7\u00f5es mais importantes a procurar numa ficha t\u00e9cnica s\u00e3o a FloorScore, a GREENGUARD Gold e a Eurofins Indoor Air Comfort Gold.<\/strong><\/p>\n<h3>Verifica\u00e7\u00e3o de certificados de laborat\u00f3rios independentes<\/h3>\n<p>Nunca se deve comprar pavimentos apenas com base num argumento de venda que se limite a dizer \u00abecol\u00f3gico\u00bb. \u00c9 preciso exigir provas concretas. O selo FloorScore \u00e9 a norma de refer\u00eancia em mat\u00e9ria de qualidade do ar para pavimentos de superf\u00edcie dura. Se um pavimento tiver este selo, significa que passou por testes rigorosos.<\/p>\n<p>Para locais com elevado tr\u00e1fego, como escolas ou hospitais, procure a certifica\u00e7\u00e3o GREENGUARD Gold. Esta norma estabelece os limites mais baixos permitidos de TVOC, para proteger crian\u00e7as e doentes. Na Europa, o certificado Eurofins Gold \u00e9 a prova definitiva de conformidade com os requisitos de qualidade do ar.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/meettfit.com\/wp-content\/uploads\/2026\/07\/pvc-5-6.jpeg&quot;\" alt=\"certificados globais de pavimentos\" \/><\/p>\n<p>Verificar a exist\u00eancia destes certificados garantir\u00e1 que adquire um produto de alta qualidade que protege a qualidade do ar no interior da sua casa.<\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p>O VOC indica qual \u00e9 a subst\u00e2ncia qu\u00edmica espec\u00edfica presente no pavimento, enquanto o TVOC indica a quantidade total de g\u00e1s que entra na sua divis\u00e3o. Nunca confie em afirma\u00e7\u00f5es gen\u00e9ricas. Pe\u00e7a sempre ao seu fornecedor um certificado FloorScore v\u00e1lido ou um relat\u00f3rio de ensaio em c\u00e2mara de 28 dias, para garantir que o seu projeto seja seguro.<\/p>\n<hr \/>\n<p><strong>Precisa de ajuda para interpretar um relat\u00f3rio de ensaio de pavimentos ou est\u00e1 \u00e0 procura de pavimentos em PVC virgem 100% com baixo teor de TVOC a granel para o seu pr\u00f3ximo projeto? Envie-me hoje mesmo uma mensagem privada para uma consulta de engenharia especializada!<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>The main difference is that VOC refers to single organic chemical gases that release into the air, while TVOC is the total sum of all these chemical gases emitted from your PVC flooring at the same time. Every day in our testing lab, I open fresh batches of vinyl rolls, SPC, and LVT flooring. Many&#8230;<\/p>","protected":false},"author":4,"featured_media":9367,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-9364","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pvc-floor-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the difference between TVOC and VOC - MF FLOOR<\/title>\n<meta name=\"description\" content=\"Compare VOC and TVOC in PVC flooring, understand laboratory testing, emission limits, and choose certified low-emission vinyl flooring with confidence.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meettfit.com\/pt\/blogue-sobre-pavimentos-em-pvc\/qual-e-a-diferenca-entre-tvoc-e-voc\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the difference between TVOC and VOC - 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