Title:
LAMINATED SHEET FOR THERMOFORMING
Document Type and Number:
Japanese Patent JP3193119
Kind Code:
B2
Abstract:
PURPOSE: To improve moisture permeability, transparancy, rigidity and moldability by laminating non-stretched polyproplyene resin layers to both surfaces of a non-stretched polyester resin layer and setting each of the thicknesses of the non-stretched polypropylene resin layers to a specific ratio range.
CONSTITUTION: A laminated sheet for thermoforming is constituted by laminating non-stretched polyprophylene resin layers to both surfaces of a non-stretched polyester resin layer. Each of the thicknesses of the non-stretched polypropylene resin layers is set to the range of 7-14% with respect to the thickness of the non-stretched polyester resin layer. The laminated sheet thus constituted is used, for example, in the production of a PTP pakage. That is, the laminated sheet 1 consisting of the non-stretched polyester resin layer 2 and the non- stretched polypropylene resin layers 3 is subjected to molding processing to form a receiving chamber 5 of a tablet 8 and the receiving chamber 5 is closed by metal foil 6 to be separated along a perforation 7. By this constitution, the laminated sheet low in moisture permeability and having high transparency and high rigidity is obtained.
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Inventors:
Ken Sawazaki
Application Number:
JP13756292A
Publication Date:
July 30, 2001
Filing Date:
May 01, 1992
Export Citation:
Assignee:
Mitsubishi Plastics Co., Ltd.
International Classes:
B29C51/08; B32B7/02; B32B27/00; B32B27/08; B32B27/32; B32B27/36; (IPC1-7): B32B27/32; B29C51/08; B32B27/36
Domestic Patent References:
| JP564863A | ||||
| JP4137836U |
Attorney, Agent or Firm:
Hasegawa Hajime (2 outside)