Extruded pet parison, container, and method

Abstract

An extruded PET parison includes a first extruded polymer comprising PET, and a second extruded polymer comprising PET. In embodiments, the first extruded polymer and the second extruded polymer are co-extruded, and the first extruded polymer has an intrinsic viscosity that is higher that the intrinsic viscosity of the second extruded polymer. A monolayer embodiment is also disclosed. In embodiments, a monolayer extruded PET container is comprised of bottle grade PET resin that has been solid stated and may have an IV from about 0.96 to about 1.4.

What is claimed is: 
     
         1 . An extruded PET parison comprising:
 a first extruded polymer comprising PET; and   a second extruded polymer comprising PET;   wherein the first and second polymers are co-extruded, the first and second extruded polymers are in a solid state, and the first extruded polymer has an intrinsic viscosity that is higher that the intrinsic viscosity of the second extruded polymer.   
     
     
         2 . The parison of  claim 1 , wherein the first extruded polymer has an intrinsic viscosity of at least 0.96. 
     
     
         3 . The parison of  claim 1 , wherein the first extruded polymer has an intrinsic viscosity from about 1.0 to about 1.4. 
     
     
         4 . The parison of  claim 1 , wherein the second extruded polymer has an intrinsic viscosity of less than 0.85. 
     
     
         5 . The parison of  claim 1 , wherein the second extruded polymer has an intrinsic viscosity of about 0.80 to about 0.87. 
     
     
         6 . The parison of  claim 1 , wherein the second extruded polymer comprises post-consumer recycled (PCR) PET or regrind PET. 
     
     
         7 . The parison of  claim 1 , wherein the second extruded polymer includes a colorant. 
     
     
         8 . The parison of  claim 1 , wherein the cross-sectional thickness of the first extruded polymer is at least about 0.20 of the total parison thickness. 
     
     
         9 . The parison of  claim 1 , wherein the cross-sectional thickness of the second extruded polymer is less than about 0.80 of the total parison thickness. 
     
     
         10 . The parison of  claim 1 , including one or more additional extruded polymer layers. 
     
     
         11 . The parison of  claim 10 , wherein the one or more additional extruded polymer layers comprise recycled or reground material. 
     
     
         12 . A container formed from the parison of  claim 1 . 
     
     
         13 . An extruded PET parison comprising:
 an extruded monolayer polymer comprising PET;   wherein the extruded monolayer polymer is in a solid state, and the extruded monolayer polymer has an intrinsic viscosity from about 0.96 to about 1.4 and is devoid of chain extenders.   
     
     
         14 . The parison of  claim 13 , wherein the intrinsic viscosity is about 1.1. 
     
     
         15 . A container formed from the parison of  claim 13 . 
     
     
         16 . The container of  claim 15 , wherein the container is substantially free of striations and haze.