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Durable oxygen scavenging plastic containers

A container, oxidation state technology, applied in the direction of containers, containers to prevent decay, transportation and packaging, etc., can solve the problems of not being tough, not properly resistant to impact, not durable, etc.

Inactive Publication Date: 2017-08-29
GRAHAM PACKAGING CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, lower PET IV containers are not as durable and tough for some applications or do not adequately withstand impact when dropped

Method used

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  • Durable oxygen scavenging plastic containers
  • Durable oxygen scavenging plastic containers
  • Durable oxygen scavenging plastic containers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Example 1 : This example shows the preparation of an oxygen-scavenging bottle made of a blend of PET and 0.7 wt.% polytetramethylene ether glycol (PTMEG). PET resin (DAK L40A, 0.75IV) and 0.7wt.% 2000MW PTMEG ( 2000 polyol, Lyondellbasell) and a blend of 0.035 wt.% cobalt neodecanoate (CoNeo) was injection stretch blow molded into a single layer 20 oz ketchup bottle (530 ml volume; average thickness = 0.05 cm) using the process previously described . The oxygen scavenging performance of the bottle was tested using the Oxysense method as described above, after filling with deoxygenated water and sealing followed by periodic measurement of oxygen ingress / oxygen content in the bottle. Oxygen ingress data in figure 1 displayed in . The bottle exhibited excellent oxygen scavenging and essentially zero oxygen ingress over the 90 week test period, while the control PET bottle showed an oxygen ingress of over 6 ppm over this period. IV measurements on a small sample cut ...

Embodiment 2

[0099] Example 2: This example shows the oxygen scavenging performance of PET bottles containing lower PTMEG levels (0.5 wt.%). PET resin (DAK L40A, 0.75IV) and 0.5wt.% 2900MW PTMEG ( A blend of 2900 polyether polyol from Invista) and 0.035 wt. % CoNeo was injection stretch blow molded into a single layer 20 oz ketchup bottle (530 ml volume; average thickness = 0.05 cm) using the process described above. A composition similar to the above except 0.05 wt. % CoNeo was also molded into a bottle designated as Example 2b. The oxygen scavenging properties of both bottles were tested as described above. Oxygen ingress data in figure 2 displayed in . Excellent oxygen scavenging performance was achieved, with the oxygen ingress close to that of oxygen after 30 weeks of testing, and the oxygen level remained below 2 ppm after 100 weeks. IV measurements of samples cut from both bottles showed the same IV value of 0.69.

Embodiment 3

[0100] Example 3: Except for the use of 0.5wt.% 2000MW PTMEG in the PET blend ( 2000, LyondellBasell) and 0.05 wt.% CoNeo, this example is similar to Example 2. A sample of the resulting bottle had an IV of 0.64.

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PUM

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Abstract

The present invention provides a wall for a package comprising at least one layer, the layer comprising a composition, the composition comprising: a polyester base polymer; at least one polyether polyol at a concentration of from 0.3 to 0.7 wt.%; and at least one transition metal in a positive oxidation state, the metal being present in the composition in an amount of from 10 to 400 ppm.

Description

technical field [0001] The present invention relates to plastic containers comprising polymers and compounds capable of reacting with oxygen entering and exiting through the walls of the plastic container. More specifically, the plastic containers of the present invention are made from compositions that provide toughness and durability as measured by intrinsic viscosity (IV). [0002] All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth herein in its entirety Same. Background technique [0003] The inclusion of oxygen scavengers in packaging structures to protect oxygen sensitive materials is known in the art. Such scavengers are believed to react with oxygen trapped in the package or permeated from the exterior of the package, thus extending the life of the package con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L71/02C08K3/24C08K5/00C08K5/09B65D81/26
CPCB65D81/266C08L67/02C08L71/02C08K3/24C08K5/0025C08K5/09
Inventor 穆拉利·K·阿卡培迪布赖恩·A·林奇
Owner GRAHAM PACKAGING CO LP