{"id":2458,"date":"2026-05-29T17:31:06","date_gmt":"2026-05-29T09:31:06","guid":{"rendered":"https:\/\/www.jcinjectionmolding.com\/?p=2458"},"modified":"2026-06-29T14:28:09","modified_gmt":"2026-06-29T06:28:09","slug":"pbt-basf-ultradur-b4500","status":"publish","type":"material_model","link":"https:\/\/www.jcinjectionmolding.com\/it\/materials\/polybutylene-terephthalate-pbt\/pbt-basf-ultradur-b4500\/","title":{"rendered":"PBT-BASF Ultradur B4500"},"content":{"rendered":"
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BASF Ultradur B4500 Toughness & Rheological Profile<\/h2>\n

Ultradur\u00ae B 4500 is a medium-viscosity, unreinforced PBT resin engineered by BASF, formulated to provide high melt strength, high tensile ductility, and excellent dimensional repeatability:<\/p>\n\n\n\n\n\n\n\n
Parametro fisico e di resistenza<\/th>\nUltradur B4500 Spec Value<\/th>\nVantaggio ingegneristico per parti stampate<\/th>\n<\/tr>\n<\/thead>\n
Exceptional Ductility<\/td>\nNominal Strain at Break >50%<\/td>\nProvides substantial structural elongation and toughness without glass fibers, preventing cracking in flexible snap-fits and hinges.<\/td>\n<\/tr>\n
Stable Flow Rheology<\/td>\nMVR 19 cm\u00b3\/10min (250\u00b0C x 2.16kg)<\/td>\nIntermediate melt flow rate ensures highly balanced pressure distribution inside thin-walled technical profiles and pipe fittings.<\/td>\n<\/tr>\n
Pure Density Profile<\/td>\nUnfilled Density 1.30 g\/cm\u00b3<\/td>\nOffers lightweight structural integrity compared to 30% glass-filled variants, ensuring lower weight in dynamic aerospace connectors.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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Structural Component Process Configurations for Ultradur B4500<\/h2>\n

With its high crystallinity rate and stable melt index, Ultradur B4500 processes smoothly across complex multi-cavity tooling:<\/p>\n\n\n\n\n\n\n\n
Tecnologia di stampaggio<\/th>\nCompatibilit\u00e0 di processo e dettagli operativi<\/th>\n<\/tr>\n<\/thead>\n
Precision Thin-Walled Profiles<\/td>\nExcellent. Highly optimized for extruding and injection molding thin-walled technical pipes, fluid-handling conduits, and complex diagnostic cassettes.<\/td>\n<\/tr>\n
Food-Contact Consumer Systems<\/td>\nExcellent (via FC \/ Food Contact compliant versions). Ideal for high-safety consumer coffee machine adapters, food packaging closures, and structural dishwashing racks.<\/td>\n<\/tr>\n
Metal-Insertion Assemblies<\/td>\nExcellent. Safe for encapsulating metallic electrical contacts and bushings directly inside high-insulation connector blocks without cracking.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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PBT-BASF Ultradur B4500 Molding & Melt Control Checklist<\/h2>\n

Processing a semi-crystalline engineering polyester like Ultradur B4500 requires strict moisture control and balanced cooling to manage volumetric shrinkage:<\/p>\n

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Hygroscopic Hydrolysis Protection<\/p>\n

At high melt temperatures, PBT is highly sensitive to moisture. Wet molding results in rapid hydrolytic chain cleavage, causing severe splay, bubbles, and a major drop in tensile strength. We pre-dry Ultradur B4500 resin in desiccant hopper dryers at 120\u00b0C (248\u00b0F) for 3\u20134 hours, keeping moisture strictly below 0.04%.<\/p>\n<\/div>\n

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Balanced Cooling & Shrinkage Controls<\/p>\n

Being an unfilled crystal grade, Ultradur B4500 exhibits high shrinkage (typically 1.60% parallel and 1.90% normal to flow). Jucheng’s tooling division uses 5-axis CNC machines to mill uniform, balanced cooling circuits directly inside mirror-polished S136 stainless steel mold cavity blocks to prevent warpage.<\/p>\n<\/div>\n

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Controllo della Temperatura di Fusione e dello Stampo<\/p>\n

Le temperature del cilindro di lavorazione sono mantenute tra 250\u00b0C e 275\u00b0C (482\u00b0F a 527\u00b0F) per garantire una fusione omogenea. Le temperature dello stampo sono mantenute a 40\u00b0C a 70\u00b0C (104\u00b0F a 158\u00b0F) per ottimizzare la struttura cristallina, l'elevata lucentezza superficiale e la resistenza meccanica.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Key Application Fields for PBT-BASF Ultradur B4500<\/h2>\n
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  • Ingegneria Elettrica e per Smart Grid:<\/strong> High-insulation connector blocks, multi-pin electrical terminals, coil bobbins, smart power meter frames, and switchgears.<\/li>\n
  • Food-Safe Consumer Systems (FC Compliant):<\/strong> Adattatori riutilizzabili per macchine da caff\u00e8 domestiche, tappi resistenti al vapore, chiusure per imballaggi alimentari e parti strutturali per lavastoviglie.<\/li>\n
  • Precision Fluid & Automotive Pipes:<\/strong> Thin-walled chemical conduits, industrial pipe connectors, fluid water mixing valves, and fuel sensor enclosures (IATF 16949).<\/li>\n<\/ul>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

    BASF Ultradur B4500 Toughness & Rheological Profile Ultradur\u00ae B 4500 is a medium-viscosity, unreinforced PBT resin engineered by BASF, formulated to provide high melt strength, high tensile ductility, and excellent dimensional repeatability: Physical & Strength Parameter Ultradur B4500 Spec Value Engineering Advantage for Molded Parts Exceptional Ductility Nominal Strain at Break >50% Provides substantial structural […]<\/p>\n","protected":false},"featured_media":2459,"template":"","meta":[],"class_list":["post-2458","material_model","type-material_model","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.jcinjectionmolding.com\/it\/wp-json\/wp\/v2\/material_model\/2458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jcinjectionmolding.com\/it\/wp-json\/wp\/v2\/material_model"}],"about":[{"href":"https:\/\/www.jcinjectionmolding.com\/it\/wp-json\/wp\/v2\/types\/material_model"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/it\/wp-json\/wp\/v2\/media\/2459"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/it\/wp-json\/wp\/v2\/media?parent=2458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}