FIELD: transport, package.
SUBSTANCE: invention relates to perform made by blow forming and intended for producing vessels. Said perform features coefficient of total drawdown varying from 12 to 16 and representing a product of crosswise and lengthwise drawdown coefficients. Note here that crosswise drawdown coefficient varies from 5.6 to 6.5, while lengthwise drawdown coefficient varies from 2.4 to 2.7. Note also that perform comprises bottle PET copolymer with free blowing volume varying from 650 ml to 800 ml measured at 100°C and 90 psi using 25 g-preform intended for 500 ml- and 65 mm-diametre bottle that features crosswise drawdown coefficient of 5.5 and lengthwise drawdown coefficient of 2.6 as well as height of 200 mm.
EFFECT: smaller amount of initial polymer with properties comparable with that used in making performs by known procedures, higher mechanical and thermal properties.
9 cl, 2 dwg
