1. Field of the Invention
The invention relates to a polyolefin-based composition including a lubricating agent, in particular such a composition intended for the manufacture of bottle caps. It also relates to a process for the manufacture of shaped objects, in particular a process for the manufacture of bottle caps from this composition.
2. Description of the Related Art
It is generally known to manufacture bottle caps from polyolefins and in particular from polyethylene. It is also known to incorporate a lubricating agent in the polyolefin in order to optimize the slip properties and thus to facilitate the unscrewing of the cap. In patent U.S. Pat. No. 3,330,796 it has already been proposed to improve the friction properties of polyolefin-based, in particular polyethylene, films by incorporating docosenoamide therein.
When it is employed as raw material in the manufacture of caps for bottles for food products, this known composition exhibits the disadvantage of imparting to the packaged products organoleptic properties (odor and taste) which are unsuitable for consumption.