公开(公告)号：US20050196563A1

公开(公告)日：2005-09-08

申请号：US11035074

申请日：2005-01-14

申请人： Hideki Ito ,  Masatosi Hashimoto ,  Yukinobu Mukouyama ,  Norimi Tabota ,  Tsutomu Oko

发明人： Hideki Ito ,  Masatosi Hashimoto ,  Yukinobu Mukouyama ,  Norimi Tabota ,  Tsutomu Oko

IPC分类号： B29C61/02 ,  C08J5/18 ,  B32B1/08

CPC分类号： C08J5/18 ,  C08J2367/02 ,  Y10T428/13

摘要： A heat shrinkable polyester film of the present invention has a transverse tear defect percentage of about 20% or less as determined in the following vibration test: the film is rolled into a tubular shape, two of its opposite edges bonded together, and then the tubular film is placed around a vertical stack (total weight: 660 g) of three food container cans each having a diameter of 72 mm and a height of 55 mm; the can stack with the tubular film placed therearound is passed through a shrink tunnel to shrink the tubular film onto the can stack; a total of 18 packs of such can stacks are placed into a cardboard box having a length of 455 mm, a width of 230 mm and a height of 165 mm (6 packs in the length direction by 3 packs in the width direction), and the cardboard box is sealed; the cardboard box is vibrated along the width direction for 30 min by a stroke of 50 mm and at a vibration rate of 180 reciprocations/min, after which the transverse tearage of the tubular film is visually observed; and the transverse tear defect percentage (%) is determined based on the number of defective packs per 18 packs, wherein the defective pack is any pack having a tear flaw of 30 mm or longer along a can periphery. The heat shrinkable polyester film of the present invention has a good shock resistance during shipping especially under low temperatures, with a good finish after shrinkage and a sufficient solvent adhesiveness. Thus, the heat shrinkable polyester film of the present invention is suitable for use in a multi-packaging label for packaging, inter alia, a stack of cans.

摘要翻译： 本发明的热收缩聚酯薄膜在以下振动试验中确定的横向撕裂缺陷率为约20％以下：将薄膜卷成管状，将其两个相对的边缘粘合在一起，然后将管状 将薄膜放置在直径为72mm，高度为55mm的三个食物容器罐的垂直叠层（总重量：660g）周围; 将放置在其周围的管状膜的堆叠通过收缩通道将管状膜收缩到罐叠上; 将总共​​18个这样的罐堆叠放置在长度为455mm，宽度为230mm，高度为165mm的纸板箱（沿长度方向6个宽度方向上包装3个包装）的纸板箱中，以及 纸箱被密封; 纸板箱沿宽度方向振动30分钟，行程为50毫米，振动速度为180次/分钟，此后目视观察到管状薄膜的横向撕裂; 横向撕裂缺陷百分比（％）是根据每18包的缺陷包的数量确定的，其中，有缺陷的包装是沿罐周边具有30mm或更长的撕裂缺陷的任何包装。 本发明的热收缩性聚酯膜在运输时具有良好的抗冲击性，特别是在低温下，收缩后的良好的涂饰和充分的溶剂粘附性。 因此，本发明的热收缩聚酯薄膜特别适合用于多包装标签中，尤其是包装一叠罐。