Polyester Resin Container With Fracturable Portion And Its Production Method
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United States of America Patent
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app pub date -
Apr 27, 2007
filing date -
Apr 27, 2007
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Abstract
To provide a polyester resin container with a fracturable portion that has improved openability and to provide its production method. In the polyester resin container with a fracturable portion, in which the material of the container is polyester resin, which comprises a mouth portion 20 contiguous to the container body and a fracturable portion 30 located above the mouth portion 20 integrally, which is equipped with a fracturable structure that can be opened by fracturing the boundary part between the opening end 22 of the mouth portion 20 and the fracturable portion 30; a groove 40 is formed approximately perpendicular to the outer surface of the boundary part between the opening end 22 of the mouth portion 20 and the fracturable portion 30 of the container, and the intrinsic viscosity of the polyester resin located at the periphery of the groove 40 is lowered than the intrinsic viscosity of the polyester resin located at a location other than the periphery of the groove 40.
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