Polyester bottles with reduced bottle-to-bottle friction
OwnerZo-Chun Jeninventor
Life of this patent
Estimating the term…
Abstract
Polyester bottles having reduced bottle-to-bottle friction and an absence of visible haze are manufactured from a polyester polymer containing an effective amount of uniformly dispersed barium sulfate as a friction-reducing additive. Preferably, the barium sulfate is present in the polyester composition in the range of from about 0.001 wt. % to about 0.1 wt. %, and has an average particle size of from 0.1 micron to 2.0 microns. The polymer may be first formed into a preform that is subsequently blown into the desired bottle configuration.
Claims20
A polyester bottle preform comprised of a polyester polymer containing an effective amount of barium sulfate as a friction-reducing additive.
A polyester bottle exhibiting reduced bottle-to-bottle friction comprised of a polyester polymer containing an effective amount of barium sulfate as a friction reducing additive, said bottle being characterized by an absence of visible haze.
A method for making polyester bottles exhibiting reduced bottle-to-bottle friction and an absence of visible haze comprising:
- a) forming a polyester polymer containing an effective amount of barium sulfate as a friction reducing additive;
- and
- b) forming a bottle from said polymer.
Dependencies are inferred from the claim text.