MANUFACTURING METHOD OF PAPER LAMINATED BY LAMINATED POLYESTER AND CONTAINER MADE OF PAPER LAMINATED WITH POLYESTER

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a paper laminated by a polyester superior in an extrudability, a processability of a container and superior in both of a color tone and an adhesion, the polyester laminated paper made by the method and a paper container made by using the above. SOLUTION: The method for producing the polyester laminated paper comprises laminating at least two kinds of polyester resins with a butylene terephthalate repeating unit as a main component on at least one surface of a paper by a coextrusion, as a resin (A) used to overlie the top surface of paper, a resin with a melt viscosity of≤500 Pa S at 250°C and a shear rate of 91.2 sec-1is used and as a resin (B) to be used on an opposite side of the paper on a layer containing the resin (A), a resin having a melt tension of≥1.0 mN at 250°C is used, and each of the resin (A) and resin (B) is laminated so as a ratio of film thickness d(resin B)/d(resin A) after the lamination to be 0.5-50. COPYRIGHT: (C)2006,JPO&NCIPI