| abstract |
PROBLEM TO BE SOLVED: To provide a heat-shrinkable polyester film for a label, which has very little generation of wrinkles, shrinkage spots, and distortion due to shrinkage. SOLUTION: At least two different polyester resins A and B as raw materials are charged into separate extruders A1 and B1, respectively, melted, and A and B resins are charged and mixed in a mixing device C in a molten state. After that, a heat-shrinkable polyester film obtained by extruding from a T-die and stretching the cooled unstretched sheet at least uniaxially. |