To provide a polyolefin resin heat-shrinkable multi-layer film having excellent properties of restoration from deformation in a range from a chilled zone of approximately 0°C to a refrigeration zone of approximately -10°C.
The polyolefin resin heat-shrinkable multi-layer film is composed of at least three layers, and its heat-shrinkage factor at 80°C is 20-50%. The film has following characteristics as described from (1) to (3). (1) A peak temperature of tanδ of the film measured by dynamic viscoelasticity measurement is -10 to 2°C. (2) In a secondary melting behavior of the film measured by a differential scanning calorimeter (DSC), a peak is at least in a range of 155°C±15°C, and a heat of crystal fusion at 125°C or higher is 10 to 20 J/g. (3) A lengthwise tear strength of the film is at least 0.05 N or greater, and a ratio of lengthwise and widthwise tear strength is lengthwise/widthwise = 1.2 to 5.0 times.
JP3989823 | Desk mat |
JP5006385 | Retroreflective article containing olefin-based sealing film |
OGIUE HIDEKI
Next Patent: LAMINATED SHEET AND MOLDING USING THE SHEET