{"id":2035,"date":"2026-08-24T08:37:07","date_gmt":"2026-08-24T08:37:07","guid":{"rendered":"https:\/\/sh-jycable.com\/?p=2035"},"modified":"2026-08-24T08:37:26","modified_gmt":"2026-08-24T08:37:26","slug":"aluminum-foil-mylar","status":"publish","type":"post","link":"https:\/\/sh-jycable.com\/pt\/aluminum-foil-mylar\/","title":{"rendered":"Folha de alum\u00ednio Mylar"},"content":{"rendered":"<p>A folha de alum\u00ednio Mylar \u00e9 um material composto constitu\u00eddo por folha de alum\u00ednio e pel\u00edcula de poli\u00e9ster (Mylar).<\/p>\n<p>I. Principais caracter\u00edsticas da folha de alum\u00ednio Mylar: 1) Excelentes propriedades de barreira. A folha de alum\u00ednio Mylar apresenta excelentes propriedades de barreira, bloqueando eficazmente a humidade, o oxig\u00e9nio, a luz e as ondas eletromagn\u00e9ticas.<br \/>\n2) Elevada resist\u00eancia e durabilidade: A adi\u00e7\u00e3o de pel\u00edcula de poli\u00e9ster aumenta a resist\u00eancia mec\u00e2nica da folha de alum\u00ednio Mylar, permitindo-lhe suportar determinados n\u00edveis de alongamento e rasgo.<br \/>\n3) Leve e f\u00e1cil de processar: A folha de alum\u00ednio Mylar \u00e9 leve, o que facilita o seu transporte e processamento.<br \/>\n4) Condutividade el\u00e9trica e desempenho em blindagem eletromagn\u00e9tica: A condutividade el\u00e9trica da folha de alum\u00ednio faz com que esta seja amplamente utilizada na ind\u00fastria eletr\u00f3nica para blindagem eletromagn\u00e9tica, protegendo equipamentos sens\u00edveis contra interfer\u00eancias.<\/p>\n<p>II. A orienta\u00e7\u00e3o (para dentro ou para fora) da camada de blindagem em folha de alum\u00ednio do cabo afeta diretamente o seu efeito de blindagem eletromagn\u00e9tica:<br \/>\n1) Quando voltada para o interior, a folha de alum\u00ednio entra em contacto direto com o n\u00facleo de fio, absorvendo a energia do campo el\u00e9trico na superf\u00edcie do condutor atrav\u00e9s do efeito de carga de imagem, reduzindo a radia\u00e7\u00e3o de campo pr\u00f3ximo em 10-15 dB.<br \/>\n2) Quando voltada para o exterior, a folha de alum\u00ednio funciona como a primeira camada de blindagem, com uma refletividade superior a 90%, melhorando a atenua\u00e7\u00e3o da interfer\u00eancia do campo magn\u00e9tico externo em 20%-30%.<br \/>\n3) Dar prefer\u00eancia \u00e0 orienta\u00e7\u00e3o para o interior: Situa\u00e7\u00f5es em que a frequ\u00eancia do sinal \u00e9 superior a 1 GHz e \u00e9 necess\u00e1rio um controlo rigoroso das emiss\u00f5es radiadas (como nas normas de compatibilidade eletromagn\u00e9tica da Classe B).<br \/>\n4) \u00c9 prefer\u00edvel que fique virado para o exterior: em situa\u00e7\u00f5es em que exista forte interfer\u00eancia externa (como uma intensidade de campo el\u00e9trico de 10 kV\/m), sejam necess\u00e1rias flex\u00f5es frequentes ou seja necess\u00e1rio ligar \u00e0 terra.<br \/>\n5) Blindagem composta: Quando os requisitos de compatibilidade eletromagn\u00e9tica (EMC) s\u00e3o rigorosos, \u00e9 adotada uma estrutura de dupla camada composta por \u201cfolha de alum\u00ednio interior + tran\u00e7a de cobre exterior\u201d, com uma efic\u00e1cia de blindagem &gt;120 dB (1 GHz).<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum foil Mylar is a composite material consisting of aluminum foil and polyester film (Mylar). I. Main characteristics of aluminum foil Mylar: 1) Excellent barrier properties. Aluminum foil Mylar exhibits excellent barrier properties, effectively blocking moisture, oxygen, light, and electromagnetic waves. 2) High strength and durability: The addition of polyester film enhances the mechanical strength [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2036,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2035","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Foil Mylar - sh-jycable.com<\/title>\n<meta name=\"description\" content=\"Aluminum foil Mylar is a composite material consisting of aluminum foil and polyester film (Mylar).\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sh-jycable.com\/pt\/aluminum-foil-mylar\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminum Foil Mylar - 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