PREFORM AND BOTTLE

摘要

The present invention relates to a preform 10 comprising a preform neck 12, a preform transition zone 14, a preform body 16 and a preform base 18. Said preform 10 is suitable for being used to produce a bottle 1 of polymeric material, designed to contain about 5 litres of liquid and having a bottle neck with a diameter C of about 38 mm. Said preform 10 further has the following dimensional parameters: A: inner diameter of the preform 10; H: distance between the plane 13 of the collar of the preform 10 and a plane transverse to the longitudinal axis 21 of the preform 10 passing through the point of the transition zone 14 of the preform 10 having maximum thickness; G: distance between the plane 13 of the collar of the preform 10 and the plane 17 of attachment of the base of the preform 10; E: generic intermediate thickness of the cross-section of the body portion 16 of the preform 10. In accordance with the invention said preform 10 is characterized in that the inner diameter A of the preform 10 is comprised between 31.8 mm and 34 mm, limit values included; the distance H between the plane 13 of the collar and the transverse plane passing through the point of the transition zone 14 of the preform 10 having maximum thickness is equal to the inner diameter A multiplied by a first numerical coefficient of proportionality delta; the distance G between the plane 13 of the collar of the preform 10 and the transverse plane passing through the plane 17 of attachment of the base of the preform 10 is equal to the inner diameter A multiplied by a second numerical coefficient of proportionality phi; and the generic intermediate thickness E of the cross-section of the preform 10 at the body portion 16 of the preform 10 is equal to the inner diameter A divided by a third numerical coefficient of proportionality alpha.