US2005118371A1PendingUtilityA1

PET copolymer composition with enhanced mechanical properties and stretch ratio, articles made therewith, and methods

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Assignee: COCA COLA COPriority: Nov 1, 2002Filed: Oct 18, 2004Published: Jun 2, 2005
Est. expiryNov 1, 2022(expired)· nominal 20-yr term from priority
Inventors:Yu ShiMark RuleChristopher C. KjorlaugLinda AnthonyThomas Milton
B29C 49/0005B29C 2949/3032B29C 2949/26B29C 2949/082B29C 2949/0872B29C 2949/22B29C 2949/0862B29C 2949/3024B29C 2949/0811B29C 2949/24B29C 2949/28B29C 2949/0829C08G 63/672B29K 2667/00C08G 63/183B29K 2995/004B65D 1/0207B29L 2031/565B29K 2995/0077B29K 2995/0067B29L 2031/7158B29K 2067/00B29K 2995/0041B29K 2105/253B29K 2995/0017B29C 49/06Y10T428/1352B29C 2949/0715B29C 2049/7879B29C 49/087B29C 2049/023B29C 49/42394
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Claims

Abstract

A container is made from a preform comprising a PET Copolymer comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component. The total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component is present in the poly(ethylene terephthalate) copolymer in an amount from about 0.2 mole percent to less than 2.2 mole percent. The container is useful in packaging beverages and corresponding methods are disclosed.

Claims

exact text as granted — not AI-modified
1 . A container made from an injection molded preform, the preform having an open ended mouth forming portion, an intermediate body forming portion, and a closed base forming portion and comprising a poly(ethylene terephthalate) copolymer (PET Copolymer) comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component, wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 2.2 mole percent and the PET Copolymer is based on 100 mole percent of the diol component and 100 mole percent of the diacid component.  
     
     
         2 . A container as in  claim 1  wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component is present in the PET Copolymer in an amount from about 1.1 mole percent to about 2.1 mole percent.  
     
     
         3 . A container as in  claim 1  wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component is present in the. PET Copolymer in an amount from about 1.2 mole percent to about 1.6 mole percent.  
     
     
         4 . A container as in  claim 1  wherein the repeat units from the non-terephthalic acid diacid component are present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent.  
     
     
         5 . A container as in  claim 1  wherein the repeat units from the non-terephthalic acid diacid component are present in the PET Copolymer in an amount from about 0.2 to about 0.75 mole percent.  
     
     
         6 . A container as in  claim 1  wherein the repeat units from the non-terephthalic acid diacid component are present in the PET Copolymer in an amount from about 0.25 to about 0.6 mole percent.  
     
     
         7 . A container as in  claim 1  wherein the repeat units from the non-terephthalic acid diacid component are present in the PET Copolymer in an amount from about 0.25 to less than about 0.5 mole percent.  
     
     
         8 . A container as in  claim 1  wherein the repeat units from the non-ethylene glycol diol component are present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         9 . A container as in  claim 1  wherein the repeat units from the non-ethylene glycol diol component are present in the PET Copolymer in an amount from about 0.5 to about 1.6 mole percent.  
     
     
         10 . A container as in  claim 1  wherein the repeat units from the non-ethylene glycol diol component are present in the PET Copolymer in an amount from about 0.8 to about 1.3 mole percent.  
     
     
         11 . A container as in  claim 1  wherein the repeat units from the non-terephthalic acid diacid component are present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and the repeat units from the non-ethylene glycol diol component are present in the PET Copolymer in an amount from 0.1 to about 2.0 mole percent.  
     
     
         12 . A container as in  claim 1  wherein the non-terephthalic acid diacid component comprises repeat units from diacids selected from the group consisting of adipic acid, succinic acid, isophthalic acid, phthalic acid, 4,4′-biphenyl dicarboxylic acid, and naphthalenedicarboxylic acid.  
     
     
         13 . A container as in  claim 1  wherein the non-terephthalic acid diacid component comprises repeat units from 2,6-naphthalenedicarboxylic acid.  
     
     
         14 . A container as in  claim 1  wherein the non-ethylene glycol diol component comprises repeat units from a diol selected from the group consisting of cyclohexanedimethanol, propanediol, butanediol, and diethylene glycol.  
     
     
         15 . A container as in  claim 1  wherein the non-ethylene glycol diol component comprises repeat units from diethylene glycol.  
     
     
         16 . A container as in  claim 1  wherein the repeat units from the non-terephthalic acid diacid component are 2,6-naphthalenedicarboxylic acid and present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and wherein the repeat units from the non-ethylene glycol diol component are diethylene glycol and present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         17 . A container as in  claim 1  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         18 . A container as in  claim 1  wherein the preform has a stretch ratio in the range from about 8 to about 10.  
     
     
         19 . A container as in  claim 1  wherein the PET Copolymer is a reaction grade copolymer.  
     
     
         20 . A container as in  claim 1  wherein the intermediate body forming portion of the preform has a wall thickness from about 1.5 to about 8 mm and an inside diameter from about 10 to about 30 mm, and the preform has a finish, a closed end opposite the finish, and a height from the closed end to the finish of from about 50 to about 150 mm.  
     
     
         21 . A container as in  claim 1  wherein the container has a volume within the range from about 0.25 to about 3 liters.  
     
     
         22 . A container as in  claim 1  wherein the container is a bottle, drum, carafe, or cooler.  
     
     
         23 . A preform having an open ended mouth forming portion, an intermediate body forming portion, and a closed base forming portion, and comprising a PET Copolymer comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component, wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 2.2 mole percent and the PET Copolymer is based on 100 mole percent of the diol component and 100 mole percent of the diacid component.  
     
     
         24 . A preform as in  claim 23  wherein the non-terephthalic acid diacid component comprises repeat units from 2,6-naphthalenedicarboxylic acid and the non-ethylene glycol diol component comprises repeat units from diethylene glycol.  
     
     
         25 . A preform as in  claim 24  wherein the repeat units from 2,6-naphthalenedicarboxylic acid are present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and wherein the repeat units from the diethylene glycol are present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         26 . The preform as in  claim 24  wherein 2,6-naphthalenedicarboxylic acid is present from about 0.2 to about 0.75 mole percent and the diethylene glycol is present in an amount of about 0.5 to about 1.6 mole percent.  
     
     
         27 . A preform as in  claim 23  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         28 . A preform as in  claim 23  wherein the preform has a stretch ratio in the range from about 8 to about 10.  
     
     
         29 . A preform as in  claim 23  wherein the PET Copolymer is a reaction grade copolymer.  
     
     
         30 . A preform for use in making a container comprising a PET Copolymer comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component; 
 wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 3.0 mole percent based on 100 mole percent of the diol component and 100 mole percent of the diacid component, and    wherein the non-ethylene glycol diol component is present in an amount of from about 0.1 to about 2.0 mole percent and the non-terephthalic acid diacid component is present in an about of about 0.1 to about 1.0 mole percent.    
     
     
         31 . A preform as in  claim 30  wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 2.6 mole percent.  
     
     
         32 . A preform as in  claim 30  wherein the non-ethylene glycol diol component is derived from diethylene glycol.  
     
     
         33 . A preform as in  claim 30  wherein the non-terephthalic acid diacid component is derived from 2,6-naphthalenedicarboxylic acid or its diester.  
     
     
         34 . A preform as in  claim 30  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         35 . A preform as in  claim 30  wherein the preform has a stretch ratio in the range from about 8 to about 10.  
     
     
         36 . A packaged beverage comprising a container made from an injection molded preform and a beverage disposed in the container, wherein the preform: 
 (a) has an open ended mouth forming portion, an intermediate body forming portion, and a closed base forming portion, and    (b) comprises a PET Copolymer comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component, wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 2.2 mole percent and the PET Copolymer is based on 100 mole percent of the diol component and 100 mole percent of the diacid component.    
     
     
         37 . A packaged beverage as in  claim 36  wherein the repeat units from the non-terephthalic acid diacid component are 2,6-naphthalenedicarboxylic acid and present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and wherein the repeat units from the non-ethylene glycol diol component are diethylene glycol and present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         38 . A packaged beverage as in  claim 36  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         39 . A packaged beverage as in  claim 36  wherein the preform has a stretch ratio in the range from about 8 to about 10.  
     
     
         40 . A method for reducing the cycle time for making a container comprising the steps of: 
 (1) providing a PET Copolymer melt comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component, wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component is present in the PET Copolymer in an amount from about 0.2 mole percent to less than about 2.2 mole percent,    (2) then injecting the PET Copolymer into a mold,    (3) then cooling the mold and the contained polymer,    (4) then releasing from the mold a preform,    (5) then reheating the preform, and    (6) then blow molding the preform into a container;    wherein the cycle time for making the container is reduced as compared to a second cycle time for making a second container comprising a poly(ethylene terephthalate) resin having comonomer modification greater than about 2.2 mole percent of a combination of a non-ethylene glycol diol component and a non-terephthalic acid diacid component.    
     
     
         41 . A method as in  claim 40  wherein the repeat units from the non-terephthalic acid diacid component are 2,6-naphthalenedicarboxylic acid and present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and wherein the repeat units from the non-ethylene glycol diol component are diethylene glycol and present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         42 . A method as in  claim 40  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         43 . A method as in  claim 40  wherein the preform has a stretch ratio in the range from about 8 to about 10.  
     
     
         44 . A method for making a container comprising blow molding an injection molded preform 
 (a) having an open ended mouth forming portion, an intermediate body forming portion, and a closed base forming portion, and    (b) comprising a PET Copolymer comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component, wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 2.2 mole percent and the PET Copolymer is based on 100 mole percent of the diol component and 100 mole percent of the diacid component.    
     
     
         45 . A method as in  claim 44  wherein the repeat units from the non-terephthalic acid diacid component are 2,6-naphthalenedicarboxylic acid and present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and wherein the repeat units from the non-ethylene glycol diol component are diethylene glycol and present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         46 . A method as in  claim 44  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         47 . A method as in  claim 44  wherein the preform has a stretch ratio in the range from about 8 to about 10.  
     
     
         48 . A method for making a preform for use in making containers comprising injection molding a PET Copolymer comprising a diol component having repeat units from ethylene glycol and a non-ethylene glycol diol component and a diacid component having repeat units from terephthalic acid and a non-terephthalic acid diacid component, wherein the total amount of non-ethylene glycol diol component and non-terephthalic acid diacid component present in the PET Copolymer is in an amount from about 0.2 mole percent to less than about 2.2 mole percent, and the PET Copolymer is based on 100 mole percent of the diol component and 100 mole percent of the diacid component.  
     
     
         49 . A method as in  claim 48  wherein the repeat units from the non-terephthalic acid diacid component are 2,6-naphthalenedicarboxylic acid and present in the PET Copolymer in an amount from about 0.1 to about 1.0 mole percent and wherein the repeat units from the non-ethylene glycol diol component are diethylene glycol and present in the PET Copolymer in an amount from about 0.1 to about 2.0 mole percent.  
     
     
         50 . A method as in  claim 48  wherein the preform has a stretch ratio in the range from about 8 to about 12.  
     
     
         51 . A method as in  claim 49  wherein the preform has a stretch ratio in the range from about 8 to about 10.

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