Patent ID: 6716500
Filing Date: 2004-04-06
Classification: B29C,B29K,B29L,B65D,Y10T

Abstract:
An heat-resistant and impact resistant container obtained by heat-molding a sheet provided with a thermoplastic polyester layer comprising chiefly an ethylene terephthalate unit, and having a flange portion, a barrel portion and a closed bottom portion, the wall of the barrel portion being oriented and crystallized so as to possess a crystallinity of not smaller than 15% as measured by the density method, and the wall of the barrel portion being oriented to satisfy the following formulas (1), (2) and (3),Iu(âˆ’110)/Iu(010)&lE;1.02â€ƒâ€ƒ(1) IL(âˆ’110)/IL(010)&lE;0.89â€ƒâ€ƒ(2) and(Iu(âˆ’110)/Iu(010))âˆ’(IL(âˆ’110)/IL(010))&gE;0.13â€ƒâ€ƒ(3) wherein Iu(âˆ’110) is a diffraction intensity of the surface having an index of a plane of (âˆ’110) in the upper part of the wall of the barrel portion of when an X-ray is incident on the wall surface of the container perpendicularly thereto and when the axial direction of the container is regarded to be a perpendicular of the optical coordinate, Iu(010) is a diffraction intensity of the surface having an index of a plane of (010) in the upper part of the wall of the barrel portion of when an X-ray is incident on the wall surface of the container perpendicularly thereto and when the axial direction of the container is regarded to be a perpendicular of the optical coordinate, IL(âˆ’110) is a diffraction intensity of the surface having an index of a plane of (âˆ’110) in the lower part of the wall of the barrel portion of when an X-ray is incident on the wall surface of the container perpendicularly thereto and when the axial direction of the container is regarded to be a perpendicular of the optical coordinate, and IL(010) is a diffraction intensity of the surface having an index of a plane of (010) in the lower part of the wall of the barrel portion of when an X-ray is incident on the wall surface of the container perpendicularly thereto and when the axial direction of the container is regarded to be a perpendicular of the optical coordinate, as measured by the X-ray diffraction by using a curved PSPC microdiffractometer.