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    • 3. 发明公开
    • 열수축성 폴리에스테르계 필름, 및 그의 제조방법
    • 热收缩聚酯薄膜及其生产方法
    • KR1020090034336A
    • 2009-04-07
    • KR1020097000609
    • 2007-06-13
    • 도요보 가부시키가이샤
    • 엔도다쿠로우하루타마사유키다보타노리미노세가쯔히코
    • B29C61/06B29C55/14C08J5/18
    • B29C55/146B29C61/003B29C61/06B29K2067/00B29K2995/0049C08J5/18C08J2367/02Y10T428/1328Y10T428/31786
    • A heat-shrinkable polyester film which causes the main shrinkage in the lengthwise direction and which is controlled in such a way that the lengthwise and widthwise heat shrinkage factors observed when treated in warm water of 90°C for 10 seconds, the lengthwise and widthwise refraction indexes, and the natural shrinkage factor observed after the aging at 40°C and 65%RH for 700 hours fall within prescribed ranges respectively. The heat-shrinkable polyester film can be produced by stretching an unstretched film at a temperature ranging from the Tg plus 5°C to the Tg plus 40°C at a draw ratio of 2.5 to 6.0 in the widthwise direction, passing the resulting film through an intermediate zone not accompanied with positive heating, heat-treating the film at 100 to 170°C for 1.0 to 10.0 seconds, cooling the film to lower the surface temperature of the film to a temperature of 30 to 70°C, stretching the film at a temperature ranging from the Tg plus 5°C to the Tg plus 80°C at a draw ratio of 2.0 to 7 in the lengthwise direction, and then cooling the film at a cooling rate of 30 to 70°C/sec to lower the surface temperature of the film to a temperature of 45 to 75°C.
    • 一种热缩聚酯膜,其在长度方向上引起主要收缩,并且以这样的方式控制,即在90℃的温水中处理10秒时观察到的纵向和横向热收缩因子,纵向和宽度折射 指数和在40℃和65%RH下老化700小时后观察到的自然收缩因子分别落在规定范围内。 热收缩性聚酯膜可以通过在Tg加5℃至Tg加40℃的温度范围内,在宽度方向以2.5〜6.0的拉伸比拉伸未拉伸膜,使所得膜通过 不伴随正加热的中间区域,在100〜170℃下对该膜进行1.0〜10.0秒的热处理,冷却该膜,使膜的表面温度降低至30〜70℃的温度,拉伸该膜 在Tg加5℃至Tg加80℃的温度下,在长度方向上以2.0-7的拉伸比,然后以30〜70℃/秒的冷却速度将膜冷却至更低 膜的表面温度为45〜75℃。