{"id":359,"date":"2025-07-10T16:29:57","date_gmt":"2025-07-10T08:29:57","guid":{"rendered":"https:\/\/new.nblhplastic.com\/?p=359"},"modified":"2025-07-10T16:29:57","modified_gmt":"2025-07-10T08:29:57","slug":"ps-resina-um-dos-cinco-plasticos-de-uso-geral","status":"publish","type":"post","link":"https:\/\/www.nblhplastic.com\/pt\/arquivos\/359","title":{"rendered":"Resina PS - um dos cinco principais pl\u00e1sticos de uso geral"},"content":{"rendered":"<div class=\"ace-line\" dir=\"auto\" data-node=\"true\"><span data-leaf=\"true\"><span class=\"lb\">A resina PS, ou seja, o poliestireno (Poliestireno), \u00e9 uma resina termopl\u00e1stica polimerizada com estireno como principal mat\u00e9ria-prima, \u00e9 um dos cinco principais pl\u00e1sticos de uso geral, tem muitas carater\u00edsticas excelentes e \u00e9 amplamente utilizada em muitos dom\u00ednios.<\/span><\/span><span data-string=\"true\" data-enter=\"true\" data-leaf=\"true\">\u200b<\/span><\/div>\n<div class=\"ace-line\" dir=\"auto\" data-node=\"true\"><span data-leaf=\"true\"><span class=\"lb\">Do ponto de vista das propriedades f\u00edsicas, a resina PS \u00e9 um gr\u00e2nulo brilhante e transparente ou s\u00f3lido granular, com uma densidade de cerca de 1,04 - 1,09g \/ cm\u00b3, transpar\u00eancia de at\u00e9 88% - 92%, \u00edndice de refra\u00e7\u00e3o de 1,59 - 1,60 entre a apar\u00eancia de muito bonito. Sua temperatura de fus\u00e3o \u00e9 de 150 - 180 \u2103, temperatura de decomposi\u00e7\u00e3o t\u00e9rmica de 300 \u2103, temperatura de distor\u00e7\u00e3o de calor de 70 - 100 \u2103, uso a longo prazo de 60 - 80 \u2103, o que o torna em alguns dos requisitos de temperatura da cena pode desempenhar um papel em alguns.PS resina tem excelentes propriedades de isolamento el\u00e9trico, resistividade de volume e resistividade de superf\u00edcie. A resistividade do volume e a resistividade da superf\u00edcie s\u00e3o muito altas e n\u00e3o s\u00e3o afetadas pelas mudan\u00e7as de temperatura e umidade, mas tamb\u00e9m n\u00e3o s\u00e3o afetadas pela descarga de corona, portanto, no campo da eletr\u00f4nica e dos aparelhos el\u00e9tricos s\u00e3o muito \u00fateis. Ao mesmo tempo, tem tamb\u00e9m uma boa fluidez de processamento, f\u00e1cil de formar, pode ser moldada por inje\u00e7\u00e3o, extrus\u00e3o, moldagem por sopro, espuma, termoforma\u00e7\u00e3o, colagem, revestimento, soldadura, maquinagem, impress\u00e3o e outros m\u00e9todos de processamento numa variedade de pe\u00e7as, especialmente adequadas para moldagem por inje\u00e7\u00e3o. Al\u00e9m disso, a resina PS \u00e9 f\u00e1cil de colorir, pode ser transformada em produtos coloridos, mas tamb\u00e9m tem uma boa rigidez e resist\u00eancia qu\u00edmica, pode suportar certos \u00f3leos minerais, \u00e1cidos org\u00e2nicos, \u00e1lcalis, sais, \u00e1lcoois de baixo grau e as suas solu\u00e7\u00f5es aquosas. No entanto, tamb\u00e9m tem algumas defici\u00eancias, como a fragilidade e a facilidade de fissura\u00e7\u00e3o, a baixa resist\u00eancia ao impacto, a fraca resist\u00eancia ao calor, a n\u00e3o resist\u00eancia \u00e0 \u00e1gua a ferver, s\u00f3 pode ser utilizada a temperaturas e cargas mais baixas, a fraca resist\u00eancia \u00e0 luz solar e \u00e9 inflam\u00e1vel, a combust\u00e3o ser\u00e1 um fumo negro e produzir\u00e1 um odor especial.<\/span><\/span><span data-string=\"true\" data-enter=\"true\" data-leaf=\"true\">\u200b<\/span><\/div>\n<div class=\"ace-line\" dir=\"auto\" data-node=\"true\"><span data-leaf=\"true\"><span class=\"lb\">Em termos de m\u00e9todos de produ\u00e7\u00e3o, existem principalmente o m\u00e9todo de polimeriza\u00e7\u00e3o de propriedade e o m\u00e9todo de polimeriza\u00e7\u00e3o em suspens\u00e3o. Neste m\u00e9todo, o mon\u00f3mero de estireno \u00e9 introduzido na caldeira de pr\u00e9-polimeriza\u00e7\u00e3o, adicionando uma pequena quantidade de aditivos e iniciadores, e a pr\u00e9-polimeriza\u00e7\u00e3o \u00e9 realizada a 95 - 115\u00b0C. Quando a taxa de convers\u00e3o atinge 20% - 35%, \u00e9 ent\u00e3o introduzido no reator da torre para polimeriza\u00e7\u00e3o cont\u00ednua, e a temperatura de polimeriza\u00e7\u00e3o \u00e9 gradualmente aumentada para cerca de 170\u00b0C para atingir a convers\u00e3o completa. O estireno n\u00e3o reagido \u00e9 recuperado do topo da torre e o pol\u00edmero \u00e9 descarregado do fundo da torre e extrudido para peletiza\u00e7\u00e3o. O m\u00e9todo de polimeriza\u00e7\u00e3o em suspens\u00e3o consiste em utilizar o estireno como mon\u00f3mero, \u00e1gua como meio, adicionar gelatina, amido, \u00e1lcool polivin\u00edlico e outras gomas protectoras, ou carbonato de magn\u00e9sio, silicato de magn\u00e9sio e outros sais inorg\u00e2nicos insol\u00faveis como dispersante, bem como anidrido maleico - sal de s\u00f3dio de copol\u00edmero de estireno como co-dispersante, e per\u00f3xido de benzo\u00edlo como iniciador, iniciando a polimeriza\u00e7\u00e3o a cerca de 85 \u2103, mas tamb\u00e9m numa autoclave a 100 \u2103. Tamb\u00e9m pode ser polimerizado a alta temperatura acima de 100 \u2103 em autoclave e, finalmente, lavado, separado e seco para obter resina de gr\u00e2nulos finos incolor e transparente.<\/span><\/span><span data-string=\"true\" data-enter=\"true\" data-leaf=\"true\">\u200b<\/span><\/div>\n<div class=\"ace-line\" dir=\"auto\" data-node=\"true\"><span data-leaf=\"true\"><span class=\"lb\">De acordo com as diferen\u00e7as de propriedades e utiliza\u00e7\u00f5es, a resina PS divide-se principalmente em poliestireno de uso geral (GPPS), poliestireno de alto impacto (HIPS) e poliestireno expans\u00edvel (EPS). O poliestireno de uso geral \u00e9 uma resina termopl\u00e1stica, com um brilho transparente, boas propriedades de isolamento el\u00e9trico, fluidez de processamento, rigidez e resist\u00eancia qu\u00edmica, mas \u00e9 fr\u00e1gil e f\u00e1cil de fissurar, com baixa resist\u00eancia ao impacto, utilizado principalmente no fabrico de pe\u00e7as de moldagem por inje\u00e7\u00e3o, produtos audiovisuais, produtos de ilumina\u00e7\u00e3o, artigos de papelaria transparentes, recipientes para alimentos e cosm\u00e9ticos e outros produtos expostos. O poliestireno de alto impacto \u00e9 adicionado ao poliestireno, como as part\u00edculas de borracha polibut\u00edlica, para melhorar a resist\u00eancia ao impacto, mas o produto n\u00e3o \u00e9 transparente, sendo normalmente utilizado na produ\u00e7\u00e3o de inv\u00f3lucros de produtos electr\u00f3nicos, inv\u00f3lucros de gravadores de cassetes, artigos de uso di\u00e1rio, electrodom\u00e9sticos e inv\u00f3lucros de pequenas ferramentas el\u00e9ctricas, como a necessidade de uma elevada resist\u00eancia ao impacto do produto. O poliestireno expans\u00edvel \u00e9 um agente de expans\u00e3o f\u00edsico de baixo ponto de ebuli\u00e7\u00e3o adicionado \u00e0 resina PS, que \u00e9 aquecida e espumada durante o processamento, e tem as carater\u00edsticas de leveza, isolamento t\u00e9rmico, isolamento ac\u00fastico, \u00e0 prova de choque, etc. \u00c9 amplamente utilizado na produ\u00e7\u00e3o de lancheiras de fast-food, pain\u00e9is de constru\u00e7\u00e3o, materiais de isolamento t\u00e9rmico de edif\u00edcios, materiais de embalagem de amortecimento fr\u00e1gil e outros produtos de espuma.<\/span><\/span><span data-string=\"true\" data-enter=\"true\" data-leaf=\"true\">\u200b<\/span><\/div>\n<div class=\"ace-line\" dir=\"auto\" data-node=\"true\"><span data-leaf=\"true\"><span class=\"lb\">Em termos de aplica\u00e7\u00f5es pr\u00e1ticas, a figura da resina PS pode ser vista em todo o lado.  No dom\u00ednio dos materiais de constru\u00e7\u00e3o, o EPS pode ser utilizado para o isolamento t\u00e9rmico de edif\u00edcios, reduzir o consumo de energia na constru\u00e7\u00e3o, a resina PS tamb\u00e9m pode ser feita de imita\u00e7\u00e3o de pedra, imita\u00e7\u00e3o de pain\u00e9is decorativos de madeira para decora\u00e7\u00e3o interior e exterior; na ind\u00fastria de embalagens, a moldagem de resina PS \u00e9 boa, pode ser feita de lancheiras descart\u00e1veis, pel\u00edcula de embalagem de alimentos, recipientes de embalagem, etc., para desempenhar um papel na prote\u00e7\u00e3o e exposi\u00e7\u00e3o de produtos; na ind\u00fastria m\u00e9dica, os materiais PS em conformidade com as normas de sa\u00fade podem ser feitos de concha de equipamento m\u00e9dico, pe\u00e7as de seringa descart\u00e1veis, etc. Na ind\u00fastria m\u00e9dica, o material PS, em conformidade com as normas de higiene, pode ser utilizado para fabricar o inv\u00f3lucro de instrumentos m\u00e9dicos, pe\u00e7as de seringas descart\u00e1veis, etc.<\/span><\/span><span data-string=\"true\" data-enter=\"true\" data-leaf=\"true\">\u200b<\/span><\/div>\n<div class=\"ace-line\" dir=\"auto\" data-node=\"true\"><span data-leaf=\"true\"><span class=\"lb\">Com o progresso cont\u00ednuo da ci\u00eancia e da tecnologia, a resina PS tamb\u00e9m est\u00e1 constantemente a melhorar e a inovar, atrav\u00e9s de modifica\u00e7\u00f5es qu\u00edmicas ou f\u00edsicas, para melhorar o seu desempenho e expandir o \u00e2mbito de aplica\u00e7\u00e3o para melhor satisfazer as necessidades de v\u00e1rias ind\u00fastrias, e continuar a desempenhar um papel importante na vida moderna.<\/span><\/span><\/div>","protected":false},"excerpt":{"rendered":"<p>A resina PS, ou seja, o poliestireno (Polystyrene), \u00e9 uma resina termopl\u00e1stica polimerizada a partir do estireno como principal mat\u00e9ria-prima, \u00e9 um dos cinco principais pl\u00e1sticos de uso geral [...].<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[61,56,62],"class_list":["post-359","post","type-post","status-publish","format-standard","hentry","category-company-news","tag-ps","tag-56","tag-62"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - 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