| 摘要 |
<p>PURPOSE:To provide a vessel with high strength being uniform in its film thickness and thin in its film. CONSTITUTION:By substantially high orientating without any restrictions the parts except a neck part and a heat-crystallized bottom central part, the vessel wall is orientation-crystallized and the vessel film is made thin and also the film thickness is rendered uniform, wherein with respect to the thickest film part except the neck part and bottom central part, the ratio of difference between the thickest film part and the thinnest film part is 50% or less and the yield value is made high and the strength is made high extremely. In this way, the quantity of resin used herein is decreased, thereby obtaining a vessel with high strength being light weight without whitening as well as being uniform in its wall thickness and thin in its film thickness.</p> |
