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    • 3. 发明公开
    • 표면 광확산성 폴리에스테르 필름
    • 表面光扩散聚酯膜
    • KR1020090091246A
    • 2009-08-26
    • KR1020097016225
    • 2007-12-19
    • 도요보 가부시키가이샤
    • 바바슌이치로사사키야스시니시무쯔오하마모토시로이토가쯔야구로이와하루노부노세가쯔히코
    • G02B5/02C08J5/18B32B27/36
    • Disclosed is a light-diffusing polyester film composed of a biaxially oriented polyester film, which is characterized in that (1) the film has a supporting layer composed of a crystalline homopolyester or a crystalline polyester containing a copolymerization component, and a light-diffusing layer arranged on at least one side of the supporting layer by co-extrusion and composed of a blended composition containing 50-99 parts by mass of a crystalline polyester containing a copolymerization component having a melting point of 235-255‹C and 1-50 parts by mass of an additive incompatible with the polyester. This light-diffusing polyester film is further characterized in that (2) the film has a plane orientation coefficient P of 0.08-0.16; (3) the film has a surface haze of not less than 15%; (4) the film has an internal haze less than the surface haze; and (5) the film has a dimensional change rate at 150‹C of not more than 3% and a tensile strength of not less than 100 MPa. ® KIPO & WIPO 2009
    • 公开了一种由双轴取向聚酯膜构成的光扩散性聚酯膜,其特征在于,(1)该膜具有由结晶均聚酯或含有共聚成分的结晶性聚酯构成的支持层,以及光扩散层 通过共挤出布置在支撑层的至少一侧上,并由含有50-99质量份含有熔点为235-255℃的共聚成分和1-50份的结晶聚酯的共混组合物 的与聚酯不相容的添加剂。 该光扩散性聚酯膜的特征还在于,(2)膜的面取向系数P为0.08〜0.16; (3)膜的表面雾度不小于15%; (4)膜的内部雾度小于表面雾度; (5)该薄膜的尺寸变化率为150℃以下3%以下,拉伸强度为100MPa以上。 ®KIPO&WIPO 2009