Oxygen scavenging monolayer bottles
View Patent ↗Monolayer packages comprised of an oxygen scavenging composition suitable for direct contact with package contents and recycle with other polyester bottles are disclosed. The oxygen scavenging composition is comprised of a modified copolymer which is comprised of predominantly polyester segments and an oxygen scavenging amount of oxygen scavenging segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. Use of these oxygen scavenging copolymers in bottles provides a clear and rigid monolayer bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolymers of this invention are over 99 wt % PET and contain less than 50 ppb of extractable components.
1. A monolayer polyester package for oxygen sensitive products comprised of an oxygen scavenging composition wherein the oxygen scavenging composition comprises a modified copolymer comprised of predominately polycondensate segments and a lesser weight percentage of oxygen scavenging segments, wherein the monolayer package is appropriate for direct contact with the oxygen sensitive products and has a haze value less than about 8% and wherein the migration level of the components of oxygen scavenging composition from the package to the oxygen sensitive products is less than 50 ppb.
2. A monolayer polyester package for oxygen sensitive products comprised of an oxygen scavenging composition wherein the monolayer package is appropriate for direct contact with the oxygen sensitive products and has a haze value less than about 8% and comprises 0.02 to 10 wt % modified copolymer and 90 to 99.8 wt % unmodified polyester wherein the modified copolymer is comprised of predominantly polycondensate segments and a lesser weight percentage of oxygen scavenging segments.
3. A monolayer polyester package for a food or beverage comprised of an oxygen scavenging composition wherein the oxygen scavenging composition comprises a modified copolymer comprised of predominately polycondensate segments and a lesser weight percentage of oxygen scavenging segments, wherein the monolayer package is appropriate for direct contact with the food or beverage, has a haze value less than about 8% and wherein the migration level of the components of oxygen scavenging composition from the package to the food or beverage is less than 50 ppb.
4. A monolayer polyester package for a food or beverage comprised of an oxygen scavenging composition comprising 0.02 to 10 wt % modified copolymer and 90 to 99.8 wt % unmodified polyester, wherein the modified copolymer is comprised of predominantly polycondensate segments and a lesser weight percentage of oxygen scavenging segments, and wherein the monolayer package is appropriate for direct contact with the food or beverage and has a haze value less than about 8%.