Polyester bottle resins having reduced frictional properties and methods for making the same
AssigneeWellman, Inc.
InventorsWalter Lee Edwards, Robert Joseph Schiavone, Carl Steven Nichols, Tony Clifford Moore
Life of this patent
Estimating the term…
Abstract
The invention is a polyester resin that includes between about 20 and 200 ppm of an inert particulate additive, preferably selected from the group consisting of surface-modified talc and surface-modified calcium carbonate. The invention is also a method of making the polyester resin, which is capable of being formed into low-haze, high-clarity bottles possessing reduced coefficient of friction.
Claims39
A polyester resin that is capable of being formed into high-clarity bottles possessing reduced coefficient of friction, the resin comprising polyethylene terephthalate and between about 20 and 200 ppm of an inert particulate additive selected from the group consisting of talc and calcium carbonate, the inert particulate additive having an average particle size of less than about ten microns.
A polyester resin that is capable of being formed into high-clarity bottles possessing reduced coefficient of friction, the resin comprising polyethylene terephthalate and between about 40 and 100 ppm of an inert particulate additive selected from the group consisting of surface-modified talc and surface-modified calcium carbonate, the inert particulate additive having an average particle size of less than about two microns.
A polyester resin that is capable of being formed into high-clarity bottles possessing reduced coefficient of friction, the resin comprising polyethylene terephthalate and between about 20 and 200 ppm of surface-modified talc having an average particle size of less than about ten microns.
A polyester resin that is capable of being formed into high-clarity bottles possessing reduced coefficient of friction, the resin comprising polyethylene terephthalate and between about 20 and 200 ppm of surface-modified calcium carbonate having an average particle size of less than about ten microns.
Dependencies are inferred from the claim text.