2、為模內射出裝飾之統稱,目前依製程不同可分為IMF及IML兩種,其概要程序如下:薄膜印刷 (IMF, IMR)高壓真空成型 (IMF)精密3D裁切加工 (IMF)薄膜射出成型加工(IMF, IMR)一. IMF (In-Mold by Film) 此製程是先將油墨印刷在一層厚度約0.18 m/m的Film上(材質為PC或PET),經過forming之後,於射出機台上,靠著模具定位機構定位,在模內與基材一同成型。1.Film 的材質選用: PC – 最佳的底材PMMA - 較易脆裂、但透明度較高Polyester - 成形性及硬
3、度均佳Formable PET – Further development2. 使用PC的優缺點BenefitsClarityEase of cutting/printingCompatibility with moulding resinDisadvantagesForm precision (± 0.3mm)Flexibility (embossed switches)Not inherently weatherableChemical resistancePoor pencil hardness3. 使用PMMA的優缺
4、點BenefitsClarityGood forming behaviour (± 0.15mm)Excellent weatheringPencil hardnessDisadvantagesBrittle (cutting handling problems)Potential adhesion problems to resinForm can relax in moulding toolChemical resistance4. 使用Formable PET的優缺點BenefitsExcellent flex res
5、istanceExcellent chemical resistanceImproved formability (form precision not yet determined)DisadvantagesCost Compatibility with moulding resinRelaxation in mouldLimited supplier choiceNot yet commercial5. 鉛筆硬度測試比較PMMA 最佳PET 次之PC 最差Stress v. Temp @ 100% Strain 6. v