| abstract |
The present invention relates to a pressure-resistant polyester container having a multilayer structure composed of an inner and outer layers made of a polyester resin and at least one intermediate layer made of a functional resin, and the degree of crystallinity of the inner layer made of a polyester resin in the container body portion. 23% or more and the crystallinity of the outer layer is 18% or more, and the average value of the crystallinity of the inner layer and the crystallinity of the outer layer is 24% or more, so that even when a functional resin composition in which clay is blended with the functional resin is used as an intermediate layer, Whitening is effectively prevented, and the pressure resistant polymer ester container excellent in transparency, and its manufacturing method are provided. |