스크래치 방지 피아노블랙 수지 <Scratch resistance PIANO BLACK resin with eMold> 필요성 eMold로 무도장 piano black사출성형품을 제조하면 생활 스크래치에 대한 방지를 요구하게 된다. 2. 해결책 Hard coating을 하지 않고서도 스크래치방지를 하기 위해서는 수지 자체의 내스크래치성을 향상시켜야 한다. 나다이노베이션은 NASA6수지를 개발하여 무도장으로 피아노블랙으로 사출성형을 하여도 스크래치발생을 방지할 수 있는 해결책을 마련하게 되었읍니다 < NASA6와 eMold용 수지의 요구특성 소개>첨부
E-MOLD Resin Optimization APPENDIX E-MOLD Resin Optimization
E-Mold Resin Optimization Convention resin characteristics related E-Mold 1. High Flow(Low viscosity) gloss improve Impact/Tensile strength down easy fill easy scratch minimize knit line Heat resistance down easy Flash & Sink 2. Excessive additives ( Uncompetitive ) Flow enhance(Plasticizer) Gas generation UV stability Cloudy surface by migration Lubricants Plate out 3. Filler segregation Low sp.gr filler segregation on flow front(Talc) 4, Crystallization rate change Warmer tool, Higher Crystallization ratio
E-Mold Resin Requirement High Molecular Weight and High Viscosity - Flash and sink improve - Enough filling with multiple gates 2. High Strength - Thickness reduction and weight reduction --- Cost down 3. Minimum Volatile material - Gas mark and decomposition Improve 4. Minimum additives (Uncompatitable ) - Cloudy surface improve 5. High viscosity additives 6. Heavy fillers - Filler knit line elimination 7. Crystalline control agent (Amorphous resin blends) - Crystalline knit line improve
Anti-Scratch Resin Premise Evaluation Result Base Resin : PA-6 (Nylon) Evaluation per each modification for Scratch Improvement Evaluation Result 120 for Rockwell hardness; Feasibility for hardness improvement 5th grade for Sapphire evaluation; Performs a sufficient level of Anti-Scratch Feasibility for Non-Painting High Glossy Type Ⅰ Ⅱ Ⅲ Ⅳ Conv. E-MOLD ROCKWELL HARDNESS 117.1 119.5 117.0 119.6 117.4 119.8 117.5 119.1 SAPPHIRE SCRATCH 4.5 5