{"id":2375,"date":"2026-05-23T14:35:06","date_gmt":"2026-05-23T06:35:06","guid":{"rendered":"https:\/\/www.jcinjectionmolding.com\/?p=2375"},"modified":"2026-06-29T10:15:15","modified_gmt":"2026-06-29T02:15:15","slug":"ps-chi-mei-ph-88s","status":"publish","type":"material_model","link":"https:\/\/www.jcinjectionmolding.com\/de\/materials\/polystyrene-ps\/ps-chi-mei-ph-88s\/","title":{"rendered":"PS-Chi Mei PH-88S"},"content":{"rendered":"
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POLYREX PH-88S Extrusion & Impact Properties<\/h2>\n

POLYREX\u00ae PH-88S is a high-performance extrusion-grade HIPS resin engineered by Chi Mei Corporation, designed to deliver high melt strength, heat resistance, and structural durability:<\/p>\n\n\n\n\n\n\n\n
Materialeigenschaft<\/th>\nPOLYREX PH-88S Nominal Value<\/th>\nMolding & Sheet Processing Advantage<\/th>\n<\/tr>\n<\/thead>\n
Melt Strength<\/td>\nMFR 2.6 g\/10 min (200\u00b0C x 5kg)<\/td>\nLow melt index delivers outstanding melt strength, preventing sheet sagging or tearing during progressive deep-draw thermoforming processes.<\/td>\n<\/tr>\n
Schlagleistung<\/td>\nNotched Izod 13 kJ\/m\u00b2<\/td>\nFeatures high rubber-modified impact toughness, ensuring complete dynamic load resistance even in low-temperature refrigeration environments.<\/td>\n<\/tr>\n
Thermische Erweichung<\/td>\nVicat Softening Temperature 100\u00b0C<\/td>\nHigh-heat formulation resists sagging and thermal deformation, making it highly compatible with hot food-contact packaging.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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Specialized Process Adaptability for POLYREX PH-88S<\/h2>\n

With low melt fluidity and high structural elasticity, POLYREX PH-88S is highly optimized for robust packaging extrusion and specialized molding:<\/p>\n\n\n\n\n\n\n\n
Verarbeitungsmethode<\/th>\nFormkompatibilit\u00e4t und Prozesseinrichtungsdetails<\/th>\n<\/tr>\n<\/thead>\n
Sheet Extrusion & Thermoforming<\/td>\nExcellent. The primary process for PH-88S. Provides highly consistent, crack-free sheet extrusion for vacuum-formed refrigerator inner liners.<\/td>\n<\/tr>\n
Extrusion-Compression Molding<\/td>\nExcellent. Ideal for dynamic, heavy-duty industrial containers, structural plastic trays, and disposable food cups.<\/td>\n<\/tr>\n
Blow Molding<\/td>\nGood. Its high melt strength prevents parison sagging, supporting uniform wall thickness distribution in large hollow containers.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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PS-Chi Mei POLYREX PH-88S Tooling & Orientation Management Guide<\/h2>\n

Because POLYREX PH-88S is an extrusion-grade resin with high melt viscosity, managing material orientation and thermal shrinkage is critical during fabrication:<\/p>\n

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  • Managing High Viscosity Flow:<\/strong> With an MFR of 2.6, this grade is viscous. Standard molding runners and gates must be designed with generous, rounded geometries to minimize shear stress and avoid premature material freeze-off.<\/li>\n
  • Optimizing Melt Orientation:<\/strong> High melt viscosity can cause high orientation stress along the flow path, leading to directional weakness. Jucheng\u2019s tooling division uses 5-axis CNC machines to cut balanced core inserts, optimizing material delivery.<\/li>\n
  • Melt & Die Temperature Controls:<\/strong> Processing melt temperatures are kept between 190\u00b0C and 230\u00b0C (374\u00b0F to 446\u00b0F). Die and mold temperatures are managed tightly at 40\u00b0C to 60\u00b0C (104\u00b0F\u2013140\u00b0F) using pressurized oil controllers to prevent rapid surface cooling and secure structural toughness.<\/li>\n
  • Low & Predictable Shrinkage:<\/strong> Like standard HIPS, PH-88S features a low, uniform shrinkage rate of 0.4% to 0.7%, allowing us to machine precise, tight-tolerance core cavities to secure exact end-part geometry.<\/li>\n<\/ul>\n<\/section>\n

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    Key Application Fields for PS-Chi Mei POLYREX PH-88S<\/h2>\n
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    • Appliance & Refrigerator Components:<\/strong> Deep-draw thermoformed refrigerator door liners, freezer drawers, structural inner panels, and dynamic tray accessories.<\/li>\n
    • Disposable Food Packaging:<\/strong> High-impact thermoformed yogurt cups, disposable drinking cups, food storage containers, and low-temperature storage trays.<\/li>\n
    • Industrial & Structural Sheets:<\/strong> Extruded high-impact plastic plates, protective structural covers, heavy-duty logistics bins, and dynamic separation boards.<\/li>\n<\/ul>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

      POLYREX PH-88S Extrusion & Impact Properties POLYREX\u00ae PH-88S is a high-performance extrusion-grade HIPS resin engineered by Chi Mei Corporation, designed to deliver high melt strength, heat resistance, and structural durability: Material Attribute POLYREX PH-88S Nominal Value Molding & Sheet Processing Advantage Melt Strength MFR 2.6 g\/10 min (200\u00b0C x 5kg) Low melt index delivers outstanding […]<\/p>\n","protected":false},"featured_media":2376,"template":"","meta":[],"class_list":["post-2375","material_model","type-material_model","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.jcinjectionmolding.com\/de\/wp-json\/wp\/v2\/material_model\/2375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jcinjectionmolding.com\/de\/wp-json\/wp\/v2\/material_model"}],"about":[{"href":"https:\/\/www.jcinjectionmolding.com\/de\/wp-json\/wp\/v2\/types\/material_model"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/de\/wp-json\/wp\/v2\/media\/2376"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/de\/wp-json\/wp\/v2\/media?parent=2375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}