POLYESTER COMPOSITION AND BOTTLE FOR CARBONATED PASTEURIZED PRODUCTS
This invention relates to polyester compositions useful for the manufacturing containers that minimizes the effect of secondary contamination during filling. More specifically, the present invention relates to a polyester bottle for use in filling of carbonated pasteurized products comprising at least one oxygen scavenging component that limits oxygen ingress to about 1 ppm or less when measured six months after filling, and at least one passive component that limits the carbonation loss to less than about 25% when measured six months after filing. The present invention also relates to a method of using the polyester bottle to minimize the growth of secondary contaminants in a carbonated pasteurized product.
1 . A polyester bottle for use in filling of a carbonated pasteurized product comprising at least one oxygen scavenging component that limits oxygen ingress to about 1 ppm or less when measured six months after filling, and at least one passive component that limits the carbonation loss to less than about 25% when measured six months after filing.
2 . The bottle of claim 1 wherein the oxygen ingress is about 0.02 ppm or less when measured one month after filling.
3 . The bottle of claim 1 wherein the oxygen scavenging component comprises at least one member selected from the group consisting of allylic hydrogen, benzylic hydrogen and an ether group.
4 . The bottle of claim 1 wherein the passive component is selected from the group consisting of ethylene vinyl alcohol, polyglycolic acid and partially aromatic nylon.
5 . The bottle of claim 3 further comprising a transition metal catalyst.
6 . The bottle of claim 5 further comprising an ionic compatibilizer.
7 . A method comprising:
a) forming a polyester bottle comprising at least one oxygen scavenging component that limits oxygen ingress to about 1 ppm or less when measured six months after filling,
b) a passive component that limits carbonation loss to less than about 25% when measured six months after filling, and
c) filling the polyester bottle with a carbonated pasteurized product.
8 . The method of claim 7 wherein the oxygen ingress is about 0.02 ppm or less when measured one month after filling.
9 . The method of claim 7 wherein the oxygen scavenging component comprises at least one member selected from the group consisting of allylic hydrogen, benzylic hydrogen and an ether group.
10 . The method of claim 7 wherein the passive component is selected from the group consisting of ethylene vinyl alcohol, polyglycolic acid and partially aromatic nylon.
11 . The method of claim 9 further comprising a transition metal catalyst.
12 . The method of claim 11 further comprising an ionic compatibilizer.
13 . The method of claim 7 wherein the carbonated pasteurized product is selected from the group consisting of juice and beer.