| 摘要 |
PROBLEM TO BE SOLVED: To obtain a PTP sheet excellent in moisture proofness and transparency and free from crush due to PTP formation even though the sheet is made of a laminated film having a thickness of 240μm or less. SOLUTION: The PTP sheet is made by forming a plurality of storage pockets in the laminated film comprising an intermediate layer formed of a polymer having an alicyclic structure and a PP resin layer bonded to both sides of the intermediate layer. The polymer has an elastic modulus of 1,900 to 2,200 MPa at 23°C, a melting viscosity of 1,000 Pa s or less at 220°C, a 100%-tensile-stress of 0.8 to 3.0 MPa at 110°C, and a 100%-tensile-stress of 0.1 to 0.5 MPa at 130°C. The fusing point of the PP resin is higher than 130°C, and the glass transition temperature of the polymer is lower than the temperature at which the pockets are formed. The thickness of the intermediate layer is 100 to 170μm, and the thickness of the PP resin layer is 20 to 60μm. The total thickness of the laminated film is 240μm or less. The temperature at which the pockets are formed is 110 to 130°C. The total thickness of the thinnest part of the laminated film forming the pockets is 25% or more of the total thickness of that before the pocket formation. COPYRIGHT: (C)2005,JPO&NCIPI
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