{"id":2373,"date":"2026-05-23T11:46:05","date_gmt":"2026-05-23T03:46:05","guid":{"rendered":"https:\/\/www.jcinjectionmolding.com\/?p=2373"},"modified":"2026-06-29T10:11:09","modified_gmt":"2026-06-29T02:11:09","slug":"ps-sabic-hips-638","status":"publish","type":"material_model","link":"https:\/\/www.jcinjectionmolding.com\/it\/materials\/polystyrene-ps\/ps-sabic-hips-638\/","title":{"rendered":"PS-Sabic HIPS 638"},"content":{"rendered":"
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Profilo di impatto strutturale e tenacit\u00e0 SABIC HIPS 638<\/h2>\n

SABIC\u00ae HIPS 638 \u00e8 un polistirene ad alto impatto opaco, modificato con gomma, progettato per offrire resistenza alla trazione bilanciata, facile scorrimento ed eccezionale rigidit\u00e0 meccanica:<\/p>\n\n\n\n\n\n\n\n
Attributo meccanico<\/th>\nSpecifiche SABIC HIPS 638<\/th>\nVantaggio ingegneristico per parti stampate<\/th>\n<\/tr>\n<\/thead>\n
Rinforzo con gomma<\/td>\nMatrice di fase modificata con elastomero<\/td>\nIncorpora domini di gomma polibutadienica chimicamente legati, assorbendo l'impatto meccanico e prevenendo fratture da stress fragile negli involucri strutturali.<\/td>\n<\/tr>\n
Rigidit\u00e0 Strutturale<\/td>\nModulo a trazione 2150 MPa<\/td>\nMantiene una robusta rigidit\u00e0 portante, prevenendo flessione dinamica o deformazione in componenti di elettrodomestici pesanti.<\/td>\n<\/tr>\n
Prestazioni di flusso<\/td>\nMFR 8,0 g\/10 min (200\u00b0C x 5kg)<\/td>\nEnsures a highly uniform melt flow under moderate shear, facilitating fast cycles in multi-cavity hot runner systems.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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Process Compatibility and Mold Setup for SABIC 638<\/h2>\n

SABIC HIPS 638 processes consistently across various high-volume injection molding configurations:<\/p>\n\n\n\n\n\n\n\n
Processo di stampaggio<\/th>\nProcess Suitability & Operational Details<\/th>\n<\/tr>\n<\/thead>\n
Structural Housing Molding<\/td>\nExcellent. Fully optimized for structural home appliance back covers, electronic enclosures, cosmetic displays, and printer trays.<\/td>\n<\/tr>\n
Toy & Furniture Molding<\/td>\nExcellent. Supports molding of thick-walled structural toys, snap-fit components, and rigid furniture brackets requiring high durability.<\/td>\n<\/tr>\n
Thin-Wall Packaging<\/td>\nGood. Allows high-pressure injection into thin-walled industrial storage trays and dynamic product containers with reduced cycle times.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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PS-Sabic HIPS 638 Tooling & Sink Mark Mitigation Guide<\/h2>\n

Molding an amorphous impact-modified grade like HIPS 638 requires careful gate sizing and pressure profiling to prevent cosmetic sink marks and gate blush:<\/p>\n

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  • Mitigating Rib and Boss Sink Marks:<\/strong> HIPS has a low mold shrinkage rate (0.4% to 0.7%), but thick structural ribs can still pull material away during cooling, creating visible sink marks. Jucheng\u2019s tooling division uses Moldflow software to optimize gate placement and designs rib thicknesses to be 50% to 60% of the adjacent wall.<\/li>\n
  • Tool Steel Selection & Finish:<\/strong> To achieve a pristine satin matte or glossy finish, we construct mold cavities from premium S136 stainless steel hardened to 48\u201352 HRC. This keeps parting lines razor-sharp and prevents rapid gate erosion.<\/li>\n
  • Profilazione scientifica dell'iniezione:<\/strong> Processing melt temperatures are maintained between 190\u00b0C and 240\u00b0C (374\u00b0F to 464\u00b0F). Mold temperatures are kept at 35\u00b0C to 55\u00b0C (95\u00b0F\u2013131\u00b0F). Slower injection speeds and progressive pack pressures are applied to avoid shear stress near gates.<\/li>\n
  • Ottimizzazione dell'Estrazione e degli Sformi:<\/strong> Because HIPS 638 is highly rigid, deep structural ribs require polished draft angles (minimum 1.5\u00b0). We utilize broad ejector pins or stripper bars to prevent part stress and ejection drag marks.<\/li>\n<\/ul>\n<\/section>\n

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    Key Application Fields for PS-Sabic HIPS 638<\/h2>\n
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    • Home Appliances:<\/strong> Refrigerator interior components, dynamic door panels, washing machine control trims, air conditioner covers, and vacuum cleaner shells.<\/li>\n
    • Toys & Children’s Goods:<\/strong> Rigid building block components, durable toy vehicle chassis, play set structures, and children’s study table accessories.<\/li>\n
    • Industrial & Electronic Casings:<\/strong> Desktop printer trays, computer monitor back housings, industrial equipment control bezels, and secondary storage bins.<\/li>\n<\/ul>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

      SABIC HIPS 638 Structural Impact & Toughness Profile SABIC\u00ae HIPS 638 is an opaque, rubber-modified high-impact polystyrene designed to deliver balanced tensile strength, easy flow, and exceptional mechanical stiffness: Mechanical Attribute SABIC HIPS 638 Specs Engineering Advantage for Molded Parts Rubber Toughening Elastomer-Modified Phase Matrix Incorporates chemically bonded polybutadiene rubber domains, absorbing mechanical impact and […]<\/p>\n","protected":false},"featured_media":2374,"template":"","meta":[],"class_list":["post-2373","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\/2373","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\/2374"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/it\/wp-json\/wp\/v2\/media?parent=2373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}