| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a container for seeing through the contents which is made of a polylactic acid polymer film, a paper, and a laminated material decomposing substantially in the natural environment, and of which the alignment polylactic acid film constituting a contents transparency-giving part does not lose its transparency even if it is exposed to a high temperature atmosphere in a film sticking process, so that it is possible to visibly and clearly confirm the contents. <P>SOLUTION: The alignment polylactic acid film has a surface orientation ratioΔP of 3.0×10-<SP>-3</SP>or more. Also, according to the above film, the difference (ΔHm-ΔHc) between a crystal melting heatΔHm generated upon increasing the temperature of the film and the heat of crystallizationΔHc generated due to crystallization during the temperature increase is 20 J/g or more, and the calculation of ä(ΔHm-ΔHc)/ΔHm} is 0.75 or more. The paper has a window formed by punching through part of it. Thus, the alignment polylactic acid film and the paper is laminated to form the container for seeing through the contents. Particularly, the alignment polylactic acid film is made as a copolymer, of which the ratio between L-lactic acid and D-lactic acid is within a range of 100:0 to 94:6, or 0:100 to 6:94. <P>COPYRIGHT: (C)2003,JPO</p> |
