{"id":860,"date":"2026-05-18T11:19:18","date_gmt":"2026-05-18T03:19:18","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?post_type=product&#038;p=860"},"modified":"2026-06-08T13:19:52","modified_gmt":"2026-06-08T05:19:52","slug":"stl-gpps-535","status":"publish","type":"product","link":"https:\/\/bastone-petrochem.com\/es\/product\/stl-gpps-535\/","title":{"rendered":"STL GPPS 535 \u2014 Poliestireno de Uso General | Grado Petroqu\u00edmico de Lianyungang"},"content":{"rendered":"<div data-test-render-count=\"1\">\n<div class=\"group\">\n<div class=\"contents\">\n<div class=\"group relative relative pb-3\" data-is-streaming=\"false\">\n<div class=\"font-claude-response relative leading-[1.65rem] [&amp;_pre&gt;div]:bg-bg-000\/50 [&amp;_pre&gt;div]:border-0.5 [&amp;_pre&gt;div]:border-border-400 [&amp;_.ignore-pre-bg&gt;div]:bg-transparent [&amp;_.standard-markdown_:is(p,blockquote,h1,h2,h3,h4,h5,h6)]:pl-2 [&amp;_.standard-markdown_:is(p,blockquote,ul,ol,h1,h2,h3,h4,h5,h6)]:pr-8 [&amp;_.progressive-markdown_:is(p,blockquote,h1,h2,h3,h4,h5,h6)]:pl-2 [&amp;_.progressive-markdown_:is(p,blockquote,ul,ol,h1,h2,h3,h4,h5,h6)]:pr-8\">\n<div class=\"standard-markdown grid-cols-1 grid [&amp;_&gt;_*]:min-w-0 gap-3 standard-markdown\">\n<p>LianYunGang Petrochemical produces STL GPPS 535 \u2014 sold under the plant grade designation STL 535T \u2014 through continuous bulk polymerization of styrene monomer. The applicable production standard is Q\/3207 LPC 601-2023. CAS number 9003-53-6 identifies the polystyrene homopolymer polymer type across all general-purpose grades from this producer.<\/p>\n<p>The MFR of 3.04 g\/10min, measured at 200\u00b0C and 5 kg load per GB\/T 3682.1-2018, places this grade in the medium-flow range for GPPS. Medium-flow GPPS processes reliably on standard injection molding presses and single-screw extruders without requiring aggressive back pressure or melt temperature adjustments. Processors running thin-walled or optically demanding parts favor this viscosity range because it fills cavities with lower gate stress than high-MFR grades produce.<\/p>\n<p>Optical performance is a defining characteristic of this grade. Luminous transmittance came in at 90.3% and haze at exactly 0.3% on the tested batch, both measured per GB\/T 2410-2008. The yellowness index of -5.9, recorded per HG\/T 3862-2006, reflects a slightly blue-neutral cast rather than a warm or yellowed appearance \u2014 an advantage for light diffusion panels and enclosures where color neutrality under white LED sources is part of the part specification.<\/p>\n<p>Residual styrene monomer content measured at 360 mg\/kg, well within the Superior grade threshold of \u2264500 mg\/kg set by Q\/3207 LPC 601-2023. Lower residual monomer reduces odor in finished parts, a factor that procurement teams for food-adjacent packaging and indoor lighting enclosures include in supplier qualification criteria with increasing frequency.<\/p>\n<p>Every shipment BASTONE arranges for STL GPPS 535 comes with the original LianYunGang Petrochemical inspection report, traceable to the specific production batch number. Buyers receive the actual manufacturer document \u2014 not a reformatted summary or third-party retest \u2014 with results logged against both Superior and Qualified grade thresholds.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p data-path-to-node=\"1\" data-imt-p=\"1\">STL GPPS 535 es una resina de poliestireno de uso general fabricada por LianYunGang Petrochemical Co., Ltd., un productor afiliado a SINOPEC con sede en la provincia de Jiangsu, China. La combinaci\u00f3n del grado de claridad \u00f3ptica, bajo contenido de mon\u00f3mero residual y tasa de flujo de fusi\u00f3n media lo convierte en una opci\u00f3n pr\u00e1ctica para moldeadores por inyecci\u00f3n y extrusores que suministran componentes de iluminaci\u00f3n, paneles de visualizaci\u00f3n y envases r\u00edgidos.<\/p>\n<p data-path-to-node=\"1\" data-imt-p=\"1\">BASTONE Petrochem obtiene y distribuye STL GPPS 535 con documentaci\u00f3n COA completa y trazable por lote directamente del fabricante.<\/p>","protected":false},"featured_media":830,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[57],"product_tag":[],"class_list":["post-860","product","type-product","status-publish","has-post-thumbnail","product_cat-gpps","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>STL GPPS 535 Polystyrene Resin | BASTONE Petrochem<\/title>\n<meta name=\"description\" content=\"STL GPPS 535 GPPS by LianYunGang Petrochemical: MFR 3.04 g\/10min, haze 0.3%, transmittance 90.3%, residual monomer 360 mg\/kg. 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