| 摘要 |
<p>PURPOSE: A polyester film is provided not to be attached of foreign substances, not to generate static electricity, to easily control surface roughness and thermal contraction ratio, and to be suitable for off-line release coating process. CONSTITUTION: A polyester film for a transparent adhesive separate sheet is biaxially stretched polyethylene terephthalate film in which both sides are not corona surface treated or inline coating treated, and satisfies formula 1: 5.0 <= haze <= 7.5 and formula 2-1: MDHS = 0.91 - 0.130*TDHS, MDTS = 20.9 + 0.165*TDTS at the same time, but, MDTS is 23kgf/mm^2 or more. The film has the thickness of 50±5 micron, of which thermal contraction ratio along MD direction is controlled to minus value.</p> |
