| 摘要 |
PURPOSE: A reflective sheet for a laminate type backlight unit is provided to manufacture a laminate type reflective sheet by using a biaxial orientation reflective film having thin thickness and to reduce manufacturing costs. CONSTITUTION: Terephthalic acid among dicarbonic acid components or ester plasticity derivative is used as a major compositional component of an aromatic compound. A reflective sheet is formed by laminating a polyester film and a sheet in which material density of raw polymer is under 1.20g/cm^2over two layers. The reflectivity of the reflective sheet is over 95% at one side. The thermal shrinkage ratio of the sheet is less than 3.5%. The reflectivity of the polyester film is over 40%. The thickness of the sheet and paper is over 50 micron. |
