{"id":2377,"date":"2026-05-23T14:49:01","date_gmt":"2026-05-23T06:49:01","guid":{"rendered":"https:\/\/www.jcinjectionmolding.com\/?p=2377"},"modified":"2026-06-29T10:17:58","modified_gmt":"2026-06-29T02:17:58","slug":"abs-chi-mei-polylac-pa-757","status":"publish","type":"material_model","link":"https:\/\/www.jcinjectionmolding.com\/ko\/materials\/abs\/abs-chi-mei-polylac-pa-757\/","title":{"rendered":"ABS-Chi Mei POLYLAC PA-757"},"content":{"rendered":"
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POLYLAC PA-757 Mechanical & Aesthetic Profile<\/h2>\n

POLYLAC\u00ae PA-757 is a premium general-purpose ABS copolymer engineered by Chi Mei Corporation, designed to provide high surface hardness, medium impact strength, and an exceptional gloss finish:<\/p>\n\n\n\n\n\n\n\n
\ud2b9\uc131 \uae30\uc900<\/th>\nPOLYLAC PA-757 Typical Metric<\/th>\n\uc131\ud615 \ubc0f \ucd5c\uc885 \uc0ac\uc6a9 \uc774\uc810<\/th>\n<\/tr>\n<\/thead>\n
Surface Hardness<\/td>\nRockwell Hardness 116 R-Scale<\/td>\nProvides exceptional scratch resistance and solid hand feel, ensuring consumer casings retain a premium look over long-term use.<\/td>\n<\/tr>\n
\uac15\uc131-\ucda9\uaca9 \uade0\ud615<\/td>\nFlex Modulus 2650 MPa \/ Impact 190 J\/m<\/td>\nCombines robust structural load-bearing rigidity with decent drop-test impact strength for dynamic outer enclosures.<\/td>\n<\/tr>\n
Process Melt Flow<\/td>\nMFR 1.8 g\/10 min (200\u00b0C x 5kg)<\/td>\nDelivers outstanding mechanical strength and viscosity stability, minimizing gate blush and cold-flow marks on large cosmetic parts.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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Process & Aesthetic Adaptability for POLYLAC PA-757<\/h2>\n

With excellent flow uniformity and high gloss potential, POLYLAC PA-757 processes reliably across advanced molding lines:<\/p>\n\n\n\n\n\n\n\n
\uacf5\uc815 \ubc94\uc8fc<\/th>\n\uc131\ud615 \ud638\ud658\uc131 \ubc0f \uc6b4\uc601 \uc138\ubd80 \uc0ac\ud56d<\/th>\n<\/tr>\n<\/thead>\n
\uace0\uad11\ud0dd \uc18c\ube44\uc790 \uac00\uc804<\/td>\nExcellent. Highly optimized for gaming controllers, smart home hubs, cosmetic console shells, and luxury speaker housings requiring a piano-black mirror finish.<\/td>\n<\/tr>\n
Structural & Mechanical Components<\/td>\nExcellent. Well-suited for heavy-duty household appliance bezels, office copier internal frames, and rigid structural toy blocks.<\/td>\n<\/tr>\n
Overmolding & 2K Assemblies<\/td>\nGood. Acts as a highly rigid base substrate that overmolds beautifully with TPE or TPU soft elastomers, creating secure, high-aesthetic grips.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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ABS-Chi Mei POLYLAC PA-757 Tooling & Gloss Optimization Guide<\/h2>\n

Molding an amorphous polymer like POLYLAC PA-757 requires strict thermal boundaries and diamond-polished tools to eliminate splay and visible knit lines:<\/p>\n

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  • Prisinte Gloss Surface (Mirror-Finished Molds):<\/strong> To exploit PA-757’s high-gloss potential, Jucheng\u2019s tooling division uses hardened S136 stainless steel mold cavity inserts heat-treated to 50 HRC and mirror-polished with high-grade diamond pastes. This ensures flawless aesthetic replication directly from part ejection.<\/li>\n
  • Hygroscopic Splay Prevention:<\/strong> ABS is moderately hygroscopic. Pre-drying in desiccant dryers at 80\u00b0C\u201385\u00b0C (176\u00b0F to 185\u00b0F) for 2\u20134 hours is mandatory. Failure to dry will result in moisture-induced splay, silver streaks, and loss of tensile strength.<\/li>\n
  • \uc6a9\uc735 \ubc0f \uae08\ud615 \uc628\ub3c4 \uc81c\uc5b4:<\/strong> Barrel temperatures are kept tightly at 200\u00b0C\u2013240\u00b0C (392\u00b0F to 464\u00b0F) to prevent thermal degradation. Mold temperatures are managed between 40\u00b0C and 80\u00b0C (104\u00b0F to 176\u00b0F) to maximize surface gloss, reduce internal stresses, and completely eliminate weld lines near bosses.<\/li>\n
  • Stable Low Shrinkage:<\/strong> POLYLAC PA-757 exhibits low and predictable shrinkage (0.4% to 0.7%), supporting high-precision dimensions. Our five-axis CNC machines cut highly accurate cavities with conformal cooling loops to prevent thermal warpage.<\/li>\n<\/ul>\n<\/section>\n

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    Key Application Fields for ABS-Chi Mei POLYLAC PA-757<\/h2>\n
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    • \uc18c\ube44\uc790 \uac00\uc804:<\/strong> High-gloss television bezels, gaming console housings, remote control bodies, high-aesthetic printer covers, and router housings.<\/li>\n
    • Household Appliances:<\/strong> Air conditioner front panels, washing machine control surrounds, vacuum cleaner bodies, and kitchen coffee maker structural shells.<\/li>\n
    • Precision Consumer Products:<\/strong> Robust structural toys, high-grade snap-fit storage bins, cosmetic containers, and heavy-duty protective cases.<\/li>\n<\/ul>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

      POLYLAC PA-757 Mechanical & Aesthetic Profile POLYLAC\u00ae PA-757 is a premium general-purpose ABS copolymer engineered by Chi Mei Corporation, designed to provide high surface hardness, medium impact strength, and an exceptional gloss finish: Property Standard POLYLAC PA-757 Typical Metric Molding & End-Use Advantage Surface Hardness Rockwell Hardness 116 R-Scale Provides exceptional scratch resistance and solid […]<\/p>\n","protected":false},"featured_media":2378,"template":"","meta":[],"class_list":["post-2377","material_model","type-material_model","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.jcinjectionmolding.com\/ko\/wp-json\/wp\/v2\/material_model\/2377","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jcinjectionmolding.com\/ko\/wp-json\/wp\/v2\/material_model"}],"about":[{"href":"https:\/\/www.jcinjectionmolding.com\/ko\/wp-json\/wp\/v2\/types\/material_model"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/ko\/wp-json\/wp\/v2\/media\/2378"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/ko\/wp-json\/wp\/v2\/media?parent=2377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}