| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-shrinkable film suitable for assembling packaging of contents (objects to be packaged), which exhibits excellent heat shrinkability in a TD direction and excellent breaking strength and can be easily manufactured.SOLUTION: The heat-shrinkable film contains a total of 100 pts.mass of a linear low-density polyethylene and a low-density polyethylene, and 5-100 pts.mass of a cyclic olefin-based polymer. The heat-shrinkable film is characterized in that: (1) there is a sea-island structure in which a sea part containing the linear low-density polyethylene and the low-density polyethylene and an island part containing the cyclic olefin-based polymer are formed; (2) a ratio (A)/(B) of an aspect ratio (A) of the island part in an MD cross section formed by cutting the heat-shrinkable film in a direction parallel to a film winding direction (MD direction) to an aspect ratio (B) of the island part in a TD cross section formed by cutting in a direction (TD direction) perpendicular to the film winding direction (MD direction) is 1 or less; and (3) a length of the island part in a thickness direction (ZD direction) in the TD cross section is 0.5 μm or less.SELECTED DRAWING: None |
